Difference between revisions of "Gutierrezia Lagasca (Q2260)"
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Latest revision as of 12:50, 24 June 2022
Gutierrezia is a taxon with the rank genus within the tribe Astereae
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Gutierrezia Lagasca
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Gutierrezia is a taxon with the rank genus within the tribe Astereae
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Statements
taxon/id/Gutierrezia Lagasca
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Gutierrezia Lagasca
Gutierrezia
Lagasca
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, perennials, or subshrubs, 10–150 (–200) cm (taprooted).
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Stems erect to ascending, usually branched, glabrous or papillate-scabrous to minutely hispidulous or scabro-hirtellous.
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sessile or petiolate (decurrent);
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blades (1–5-nerved) linear to lanceolate or spatulate, margins entire (sometimes scabroso-ciliate), faces glabrous or minutely hairy, gland-dotted (sometimes obscurely), resinous.
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Heads radiate, borne singly or (3–6) in clusters or glomerules.
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Involucres cylindric to campanulate, (2–11.5 ×) 0.8–7.5 mm.
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Phyllaries 4–40 in 2–4 series (stramineous), 1-nerved or 3-nerved, (sometimes strongly convex or keeled), ovate to lanceolate, unequal, bases white-indurate, margins narrowly scarious, abaxial faces glabrous or sparsely hispidulous or hirtellous.
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Receptacles flat to conic, pitted (hairy, hairs 1-seriate, swollen, apically hooked), epaleate.
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Ray-florets 1–30, pistillate, fertile;
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corollas yellow or white (laminae coiling).
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Disc-florets 1–150, bisexual, fertile, sometimes functionally staminate;
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corollas yellow or white, tubes shorter than funnelform throats, lobes 5, erect, short-deltate;
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style-branch appendages linear-lanceolate.
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Cypselae (light tan to purplish black) clavate or cylindric, not compressed, 5–8-nerved, hairy (glabrous in G. wrightii; hairs white, usually arising primarily from between ribs, appearing to occur in longitudinal lines, usually obscuring faces, apices acute or blunt with terminal cells slightly divergent, or clavate to bulbous);
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pappi persistent or readily falling, coroniform or of 5–10 whitish, irregular, sometimes ± connate, often erose-margined, scales in 1–2 series (usually longer in discs than rays).
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papillate-scabrous
minutely hispidulous or scabro-hirtellous
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lanceolate or spatulate
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connate
sometimes more or less
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