Townsendia Hooker (Q2523)
Townsendia is a taxon with the rank genus within the tribe Astereae
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Townsendia Hooker
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Townsendia is a taxon with the rank genus within the tribe Astereae
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Statements
taxon/id/Townsendia Hooker
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Townsendia Hooker
Townsendia
Hooker
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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Stems decumbent to erect, branched from bases and/or distally, glabrate, glabrous, hispidulous, pilose, piloso-hirsute, piloso-strigose, scabrellous, sericeous, strigillose, strigoso-scabrellous, strigose, or villous.
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± petiolate (petioles grading into blades);
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blades 1-nerved, mostly spatulate to oblanceolate, lanceolate, or linear, margins usually entire, rarely toothed or lobed, faces glabrous, glabrate, pilose, scabrellous, sericeous, strigose, strigillose, or villous, abaxial often gland-dotted.
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Heads radiate, borne singly (± sessile among rosette leaves, or at ends of leafy stems, or on scapiform peduncles).
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Involucres campanulate to hemispheric or broader, 4–25 (–35+) mm diam.
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Phyllaries persistent, (16–) 20–60 (–80+) in [2–] 3–7+ series, 1-nerved (± flat, not notably keeled), usually ± lanceolate or ovate, sometimes filiform, lance-linear, lanceovate, linear, obovate, oblanceolate, or subulate, unequal (outer shorter), herbaceous, margins ± scarious (often finely erose to fimbrillate), abaxial faces usually strigose to strigillose, sometimes glabrate, glabrous, glandular-puberulent, piloso-strigose, pilose, or villous.
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Receptacles usually flat or convex (conic in T. formosa), smooth or pitted (hairy or glabrous), epaleate.
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Ray-florets (4–) 13–34 (–67+), pistillate, fertile;
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corollas usually white, pink, bluish, or lavender (yellow in T. aprica).
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Disc-florets (16–) 30–100 (–200+), bisexual, fertile;
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corollas yellow (sometimes tinged with cyan), tubes shorter than cylindro-funnelform throats, lobes 5, usually erect, sometimes spreading, lance-deltate to lance-oblong;
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style-branch appendages lance-deltate to attenuate.
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Cypselae (± stramineous) ± flattened, obovate to oblanceolate, 2 (–3) -nerved, faces glabrate or hairy (hair tips entire, forked, or glochidiform);
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pappi persistent or readily falling, of 12–35+, ± lanceolate or subulate to setiform scales (= flattened bristles of some authors; often less well developed on ray cypselae).
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strigoso-scabrellous
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mostly spatulate
oblanceolate lanceolate or linear
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mostly spatulate
oblanceolate lanceolate or linear
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mostly spatulate
oblanceolate lanceolate or linear
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less lanceolate or subulate
setiform
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