Gamochaeta argyrinea
silver cudweed, silvery cudweed, silvery everlasting
decumbent-ascending, closely white-pannose (hairs usually individually evident, seldom forming clothlike induments).
basal and cauline, basal present through flowering, blades oblanceolate to oblanceolate-oblong or oblanceolate-obovate, 1.5–5(–8) cm × 5–12(–18) mm (gradually smaller distally), faces bicolor, abaxial closely white-pannose, adaxial sparsely arachnose (evident at 10x).
campanulate, 3–3.5 mm, bases sparsely arachnose.
bisexual 4–5(–6); all corollas purple- to yellow-brown distally.
in 4–6 series, outer (tawny-transparent, never dark brown) ovate to ovate-lanceolate, lengths 1/3–4/5 inner, apices acute to acuminate, inner elliptic-oblong to oblong, laminae often purplish tinged (around stereome/lamina junction, otherwise hyaline and slightly brownish), apices truncate-rounded, apiculate (flexing slightly outward in fruit).
initially in continuous, cylindric arrays 1.5–5 cm × 10–12 mm (pressed), later sometimes interrupted, 5–18 cm × 10–12 mm (pressed; producing axillary glomerules from proximal nodes).
(tan) 0.5–0.6 mm.
Gamochaeta argyrinea
Gamochaeta argyrinea has been confused with G. purpurea, which also occurs across the coastal states of eastern United States (G. L. Nesom 2004).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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