Grindelia Willdenow (Q2253)
Grindelia is a taxon with the rank genus within the tribe Astereae
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Grindelia Willdenow
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Grindelia is a taxon with the rank genus within the tribe Astereae
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Statements
taxon/id/Grindelia Willdenow
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Grindelia Willdenow
Grindelia
Willdenow
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
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Annuals, biennials, perennials, or subshrubs, 15–250+ cm (taprooted, rhizomatous in G. oölepis).
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Stems (1–6+) usually erect, sometimes ascending or decumbent to prostrate, simple or branched, glabrous or hairy, often gland-dotted and/or resinous.
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petiolate (proximal) or sessile (distal);
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cauline blades 1-nerved, oblong, obovate, oblanceolate, or spatulate to triangular, lanceolate, or linear (bases usually clasping), margins usually serrate to dentate, sometimes entire, crenate, or pinnatifid (especially proximal), faces usually glabrous and gland-dotted, sometimes hirsutulous, hirtellous, puberulous, scabridulous, villous, or stipitate-glandular.
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Heads radiate or discoid, in corymbiform to paniculiform arrays or borne singly.
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(excluding phyllary apices).
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Phyllaries (persistent) 25–100+ in (3–) 4–9+ series, 1-nerved or obscurely so (± flat, proximally and/or medially thickened), mostly filiform, linear, or lanceolate, usually unequal, sometimes subequal, bases usually ± chartaceous (apices ± herbaceous, looped, hooked, patent, recurved, straight, or incurved), abaxial faces usually glabrous and ± resinous.
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Receptacles flat or convex, ± pitted (pits sometimes flanked by membranous or setiform enations), epaleate.
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Ray-florets 0 or 5–60+, pistillate, fertile;
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corollas yellow to orange.
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Disc-florets (20–) 100–200 (–300+), bisexual and fertile (all or outer) or functionally staminate (ovaries not producing cypselae) corollas yellow, tubes shorter than gradually to abruptly ampliate throats, lobes 5, erect or spreading, ± deltate (equal);
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style-branch appendages linear or lanceolate to ± deltate.
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Cypselae (whitish or stramineous to gray, brown, or reddish) ellipsoid to obovoid, ± compressed, sometimes ± 3–4-angled (apices smooth, coroniform, or knobby), faces smooth, striate, ribbed, furrowed, or rugose, glabrous;
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pappi falling, of (1–) 2–8 [–15], straight or contorted to curled, smooth or barbellulate to barbellate, sometimes distally clavate, subulate scales, setiform awns, or bristles in 1 series (in G. ciliata, persistent or tardily falling, of 25–40 barbellate bristles subtending 8–15+ barbellate, setiform awns or subulate scales).
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decumbent to prostrate
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spatulate
triangular lanceolate or linear
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spatulate
triangular lanceolate or linear
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spatulate
triangular lanceolate or linear
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spatulate
triangular lanceolate or linear
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usually globose
hemispheric or broadly urceolate
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3-4-angled
sometimes more or less
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