Difference between revisions of "Tetradymia de Candolle in A. P. de Candolle and A. L. P. P. de Candolle (Q2960)"

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(One intermediate revision by the same user not shown)
label / enlabel / en
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Tetradymia de Candolle
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Tetradymia de Candolle in A. P. de Candolle and A. L. P. P. de Candolle
Property / distribution
 +
w North America
Property / distribution: w North America / rank
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Normal rank
Property / distribution: w North America / reference
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Property / distribution
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nw Mexico
Property / distribution: nw Mexico / rank
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Normal rank
Property / distribution: nw Mexico / reference
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Property / taxon description fragment
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Shrubs, mostly 30–200 cm.
Property / taxon description fragment: Shrubs, mostly 30–200 cm. / rank
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Normal rank
Property / taxon description fragment: Shrubs, mostly 30–200 cm. / reference
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Property / taxon description fragment
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Stems 1–5+, erect to spreading (tomentose to pannose or glabrous, often spiny).
Property / taxon description fragment: Stems 1–5+, erect to spreading (tomentose to pannose or glabrous, often spiny). / rank
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Normal rank
Property / taxon description fragment: Stems 1–5+, erect to spreading (tomentose to pannose or glabrous, often spiny). / reference
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Property / taxon description fragment
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sessile (or obscurely petiolate);
Property / taxon description fragment: sessile (or obscurely petiolate); / rank
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Normal rank
Property / taxon description fragment: sessile (or obscurely petiolate); / reference
 +
Property / taxon description fragment
 +
blades obscurely palmately nerved (usually 1-nerved), linear to filiform, narrowly lanceolate, or oblanceolate, margins entire, faces glabrous or lanate to tomentose, sometimes glabrescent.
Property / taxon description fragment: blades obscurely palmately nerved (usually 1-nerved), linear to filiform, narrowly lanceolate, or oblanceolate, margins entire, faces glabrous or lanate to tomentose, sometimes glabrescent. / rank
 +
Normal rank
Property / taxon description fragment: blades obscurely palmately nerved (usually 1-nerved), linear to filiform, narrowly lanceolate, or oblanceolate, margins entire, faces glabrous or lanate to tomentose, sometimes glabrescent. / reference
 +
Property / taxon description fragment
 +
Heads discoid, (1–3) in distil axils or (3–8) in corymbiform clusters.
Property / taxon description fragment: Heads discoid, (1–3) in distil axils or (3–8) in corymbiform clusters. / rank
 +
Normal rank
Property / taxon description fragment: Heads discoid, (1–3) in distil axils or (3–8) in corymbiform clusters. / reference
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Property / taxon description fragment
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Calyculi 0.
Property / taxon description fragment: Calyculi 0. / rank
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Normal rank
Property / taxon description fragment: Calyculi 0. / reference
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Property / taxon description fragment
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Involucres turbinate to cylindric or hemispheric, 3–10+ mm diam.
Property / taxon description fragment: Involucres turbinate to cylindric or hemispheric, 3–10+ mm diam. / rank
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Normal rank
Property / taxon description fragment: Involucres turbinate to cylindric or hemispheric, 3–10+ mm diam. / reference
 +
Property / taxon description fragment
 +
Phyllaries persistent, 4–6 in 1–2 series, erect, distinct, mostly oblong to ovate or lanceolate, equal or subequal, margins obscurely scarious.
Property / taxon description fragment: Phyllaries persistent, 4–6 in 1–2 series, erect, distinct, mostly oblong to ovate or lanceolate, equal or subequal, margins obscurely scarious. / rank
 +
Normal rank
Property / taxon description fragment: Phyllaries persistent, 4–6 in 1–2 series, erect, distinct, mostly oblong to ovate or lanceolate, equal or subequal, margins obscurely scarious. / reference
 +
Property / taxon description fragment
 +
Receptacles flat, foveolate, epaleate.
Property / taxon description fragment: Receptacles flat, foveolate, epaleate. / rank
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Normal rank
Property / taxon description fragment: Receptacles flat, foveolate, epaleate. / reference
 +
Property / taxon description fragment
 +
Ray-florets 0.
Property / taxon description fragment: Ray-florets 0. / rank
 +
Normal rank
Property / taxon description fragment: Ray-florets 0. / reference
 +
Property / taxon description fragment
 +
Disc-florets 4–9, bisexual, fertile;
Property / taxon description fragment: Disc-florets 4–9, bisexual, fertile; / rank
 +
Normal rank
Property / taxon description fragment: Disc-florets 4–9, bisexual, fertile; / reference
 +
Property / taxon description fragment
 +
corollas cream to bright-yellow, tubes longer than funnelform or abruptly dilated throats, lobes 5, recurved, linear to lanceolate;
Property / taxon description fragment: corollas cream to bright-yellow, tubes longer than funnelform or abruptly dilated throats, lobes 5, recurved, linear to lanceolate; / rank
 +
Normal rank
Property / taxon description fragment: corollas cream to bright-yellow, tubes longer than funnelform or abruptly dilated throats, lobes 5, recurved, linear to lanceolate; / reference
 +
Property / taxon description fragment
 +
style-branches stigmatic in 2 lines, apices usually truncate to rounded-truncate, sometimes truncate-penicillate (appendages essentially 0).
Property / taxon description fragment: style-branches stigmatic in 2 lines, apices usually truncate to rounded-truncate, sometimes truncate-penicillate (appendages essentially 0). / rank
 +
Normal rank
Property / taxon description fragment: style-branches stigmatic in 2 lines, apices usually truncate to rounded-truncate, sometimes truncate-penicillate (appendages essentially 0). / reference
 +
Property / taxon description fragment
 +
Cypselae prismatic to obconic or fusiform, obscurely 5-ribbed, glabrous or hirsute to densely pilose (hairs often obscuring pappi);
Property / taxon description fragment: Cypselae prismatic to obconic or fusiform, obscurely 5-ribbed, glabrous or hirsute to densely pilose (hairs often obscuring pappi); / rank
 +
Normal rank
Property / taxon description fragment: Cypselae prismatic to obconic or fusiform, obscurely 5-ribbed, glabrous or hirsute to densely pilose (hairs often obscuring pappi); / reference
 +
Property / taxon description fragment
 +
pappi 0 or of 70–150 bristles or of 20–30, white to stramineous, subulate to setiform scales.
Property / taxon description fragment: pappi 0 or of 70–150 bristles or of 20–30, white to stramineous, subulate to setiform scales. / rank
 +
Normal rank
Property / taxon description fragment: pappi 0 or of 70–150 bristles or of 20–30, white to stramineous, subulate to setiform scales. / reference
 +
Property / taxon description fragment
 +
x = 30.
Property / taxon description fragment: x = 30. / rank
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Normal rank
Property / taxon description fragment: x = 30. / reference
 +
Property / morphology statement
 +
Property / morphology statement: range morphology value / rank
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Normal rank
Property / morphology statement: range morphology value / qualifier
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Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: simple morphology value / rank
 +
Normal rank
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: range morphology value / rank
 +
Normal rank
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: range morphology value / rank
 +
Normal rank
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: simple morphology value / rank
 +
Normal rank
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: simple morphology value / rank
 +
Normal rank
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: simple morphology value / rank
 +
Normal rank
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: simple morphology value / rank
 +
Normal rank
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: range morphology value / rank
 +
Normal rank
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
morphology statement value to: filiform narrowly lanceolate or oblanceolate
Property / morphology statement: range morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: range morphology value / rank
 +
Normal rank
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
morphology statement value to: filiform narrowly lanceolate or oblanceolate
Property / morphology statement: range morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: range morphology value / rank
 +
Normal rank
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
morphology statement value to: filiform narrowly lanceolate or oblanceolate
Property / morphology statement: range morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: simple morphology value / rank
 +
Normal rank
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: range morphology value / rank
 +
Normal rank
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: simple morphology value / rank
 +
Normal rank
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: simple morphology value / rank
 +
Normal rank
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: range morphology value / rank
 +
Normal rank
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
morphology statement value to: cylindric or hemispheric
Property / morphology statement: range morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: range morphology value / rank
 +
Normal rank
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: simple morphology value / rank
 +
Normal rank
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: simple morphology value / rank
 +
Normal rank
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: range morphology value / rank
 +
Normal rank
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: simple morphology value / rank
 +
Normal rank
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: simple morphology value / rank
 +
Normal rank
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: simple morphology value / rank
 +
Normal rank
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: simple morphology value / rank
 +
Normal rank
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: range morphology value / rank
 +
Normal rank
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: range morphology value / rank
 +
Normal rank
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: simple morphology value / rank
 +
Normal rank
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
morphology statement value: truncate-penicillate
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: range morphology value / rank
 +
Normal rank
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: range morphology value / rank
 +
Normal rank
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: range morphology value / rank
 +
Normal rank
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
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Property / morphology statement: range morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: range morphology value / rank
 +
Normal rank
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: range morphology value / rank
 +
Normal rank
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: range morphology value / rank
 +
Normal rank
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: simple morphology value / rank
 +
Normal rank
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: range morphology value / rank
 +
Normal rank
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
morphology statement value to: 150 bristles or , , scales
Property / morphology statement: range morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: simple morphology value / rank
 +
Normal rank
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: simple morphology value / rank
 +
Normal rank
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: range morphology value / rank
 +
Normal rank
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
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Property / morphology statement: range morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: range morphology value / rank
 +
Normal rank
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: simple morphology value / rank
 +
Normal rank
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
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Property / morphology statement: simple morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: simple morphology value / rank
 +
Normal rank
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: simple morphology value / rank
 +
Normal rank
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: range morphology value / rank
 +
Normal rank
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: simple morphology value / rank
 +
Normal rank
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
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Property / morphology statement: simple morphology value / reference
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Property / morphology statement
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Property / morphology statement: simple morphology value / rank
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Normal rank
Property / morphology statement: simple morphology value / qualifier
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Property / morphology statement: simple morphology value / qualifier
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Property / morphology statement: simple morphology value / qualifier
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Property / morphology statement: simple morphology value / reference
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Property / morphology statement
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Property / morphology statement: simple morphology value / rank
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Normal rank
Property / morphology statement: simple morphology value / qualifier
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Property / morphology statement: simple morphology value / qualifier
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Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: range morphology value / rank
 +
Normal rank
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
Property / morphology statement: range morphology value / qualifier
 +
morphology statement value to: obconic or fusiform
Property / morphology statement: range morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: simple morphology value / rank
 +
Normal rank
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
 +
Property / morphology statement: simple morphology value / qualifier
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Property / morphology statement: simple morphology value / reference
 +
Property / morphology statement
 +
Property / morphology statement: range morphology value / rank
 +
Normal rank
Property / morphology statement: range morphology value / qualifier
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Property / morphology statement: range morphology value / qualifier
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Property / morphology statement: range morphology value / qualifier
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Property / morphology statement: range morphology value / qualifier
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Property / morphology statement: range morphology value / reference
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Latest revision as of 12:50, 24 June 2022

Tetradymia is a taxon with the rank genus within the tribe Senecioneae
Language Label Description Also known as
English
Tetradymia de Candolle in A. P. de Candolle and A. L. P. P. de Candolle
Tetradymia is a taxon with the rank genus within the tribe Senecioneae

    Statements

    taxon/id/Tetradymia de Candolle
    0 references
    Tetradymia de Candolle
    Tetradymia
    de Candolle
    FNA Editorial Committee. 2006. Flora of North America north of Mexico. Volume 20: Magnoliophyta: Asteridae, part 7: Asteraceae, part 2. Oxford University Press, New York.
    accepted
    w North America
    nw Mexico
    Shrubs, mostly 30–200 cm.
    Stems 1–5+, erect to spreading (tomentose to pannose or glabrous, often spiny).
    sessile (or obscurely petiolate);
    blades obscurely palmately nerved (usually 1-nerved), linear to filiform, narrowly lanceolate, or oblanceolate, margins entire, faces glabrous or lanate to tomentose, sometimes glabrescent.
    Heads discoid, (1–3) in distil axils or (3–8) in corymbiform clusters.
    Involucres turbinate to cylindric or hemispheric, 3–10+ mm diam.
    Phyllaries persistent, 4–6 in 1–2 series, erect, distinct, mostly oblong to ovate or lanceolate, equal or subequal, margins obscurely scarious.
    Receptacles flat, foveolate, epaleate.
    Disc-florets 4–9, bisexual, fertile;
    corollas cream to bright-yellow, tubes longer than funnelform or abruptly dilated throats, lobes 5, recurved, linear to lanceolate;
    style-branches stigmatic in 2 lines, apices usually truncate to rounded-truncate, sometimes truncate-penicillate (appendages essentially 0).
    Cypselae prismatic to obconic or fusiform, obscurely 5-ribbed, glabrous or hirsute to densely pilose (hairs often obscuring pappi);
    pappi 0 or of 70–150 bristles or of 20–30, white to stramineous, subulate to setiform scales.