Hymenopappus biennis
Hymenopappus artemisiifolius
biennial woollywhite
oldplainsman, woolly-white
basal 2-pinnate, 6–16 cm, lobes 6–20 × 1(–3) mm;
cauline 10–40.
basal simple (5–20+ mm wide) or 1-pinnate, 8–20 cm, lobes 5–20+ × 1–5(–20+) mm;
cauline 2–16.
1–6 cm.
1–6 cm.
8;
corollas white, laminae (6–)14–16 mm.
0.
32–50+;
corollas yellowish, 3–3.5 mm, tubes 1.5 mm, throats campanulate, 1.5–2 mm, lengths 2–3 times lobes.
40–60;
corollas white to purplish or yellowish to reddish, 3–5 mm, tubes 2–3 mm, throats funnelform, 1–1.5 mm, lengths 1–1.5 times lobes.
yellowish, 5–8 × 3–5 mm.
whitish (sometimes red-tinged) or yellowish, 5–12 × 2–7 mm.
20–40 per stem.
20–60 per stem.
4 mm, glabrous;
pappi 0 or of scales 0.1–0.2 mm.
3.5–5 mm, hirtellous or villous;
pappi of 16–18 scales 0.3–1(–1.5) or 1.5–2 mm.
= 34.
Hymenopappus biennis
Hymenopappus artemisiifolius
Varieties 2 (2 in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Cauline leaves (6–)8–16; phyllaries 6–12 mm; corollas whitish to purplish; pappi 0.3–1(–1.5) mm | var. artemisiifolius |
1. Cauline leaves 2–8; phyllaries 5–7 mm; corollas yellowish to reddish; pappi 1.5–2 mm | var. riograndensis |
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