Perennials, 5–10 cm. Leaves: basal 2-pinnate, 3–20 cm, lobes 2–50 × 0.5–2 (–3) mm; cauline 0–12. Heads 1–60 per stem. Peduncles 1–16 cm. Phyllaries whitish to yellowish, 3–14 × 2–5 mm. Ray-florets 0. Disc-florets 10–80; corollas usually yellowish, sometimes whitish, 2.2–7 mm, tubes 1–2.5 mm, throats campanulate, 1–3 mm, lengths 2–8 times lobes. Cypselae 3–7 mm, ± hirtellous to villous; pappi of 12–22 scales 0.1–3 mm.

Distribution

V21-757-distribution-map.gif

Alta., Sask., Ariz., Calif., Colo., Idaho, Kans., Mont., N.Dak., N.Mex., Nebr., Nev., Oreg., S.Dak., Tex., Utah, Wash., Wyo., n Mexico

Discussion

Varieties 13 (13 in the flora).

Some plants are morphologically intermediate between some pairs of varieties of Hymenopappus filifolius as treated by B. L. Turner (1956).

Selected References

None.

Key

1 Axils of basal leaves glabrous or sparsely tomentose; cauline leaves 0 or 1(–2) > 2
1 Axils of basal leaves ± densely tomentose; cauline leaves (0–)2–12 > 3
2 Peduncles 1–2 cm; corollas 2–3 mm; anthers 2 mm; cypselae 3.5–4 mm Hymenopappus filifolius var. parvulus
2 Peduncles 2–10 cm; corollas 3–5 mm; anthers 2.5–3 mm; cypselae 4–6 mm Hymenopappus filifolius var. nudipes
3 Terminal lobes of basal leaves 2–6 mm; phyllaries 3–7 mm; florets 10–30; corollas 2–3 mm > 4
3 Terminal lobes of basal leaves (2–)3–50 mm; phyllaries (5–)6–14 mm; florets (15–)20–70+; corollas (2.5–)3–7 mm. > 5
4 Plants 5–20 cm; cauline leaves 0–3; pappi 0.1–0.8 mm Hymenopappus filifolius var. luteus
4 Plants 20–35 cm; cauline leaves 4–9; pappi 0.5–1.5 mm Hymenopappus filifolius var. pauciflorus
5 Corollas 4–7 mm, throat lengths (2–)3–8 times lobes; anthers 3–4 mm; cypselae 5–7 mm; pappi (1.2–)1.5–3 mm > 6
5 Corollas 2.5–4.5 mm, throat lengths 2–4(–5) times lobes; anthers 2–3 mm; cypselae 4–6 mm; pappi 0.2–2(–3) mm > 8
6 Peduncles 8–16 cm; corollas whitish; cypselahairs 0.5–1 mm Hymenopappus filifolius var. eriopodus
6 Peduncles 2–12 cm; corollas yellowish; cypsela hairs 1–2 mm > 7
7 Cauline leaves (1–)2–6; terminal lobes of basal leaves 5–30 mm; phyllaries 8–12(–14)mm Hymenopappus filifolius var. megacephalus
7 Cauline leaves 0–3; terminal lobes of basal leaves 3–15 mm; phyllaries 6–10 mm Hymenopappus filifolius var. lugens
8 Cauline leaves (2–)3–8; heads 5–60; corolla throats 1.3–1.8 mm Hymenopappus filifolius var. polycephalus
8 Cauline leaves 0–5(–12); heads 1–10(–40); corolla throats 1.5–2.5 mm > 9
9 Terminal lobes of basal leaves 3–6 mm; caul-ine leaves 5–12 Hymenopappus filifolius var. tomentosus
9 Terminal lobes of basal leaves 2–50 mm; cauline leaves 0–5 > 10
10 Plants 30–100 cm; terminal lobes of basal leaves 15–50 mm; pappi 0.2–1 mm Hymenopappus filifolius var. filifolius
10 Plants 5–50 cm; terminal lobes of basal leaves 2–30 mm; pappi (0.6–)1–3 mm > 11
11 Peduncles 3–15 cm; cypsela hairs 0.1–1 mm; pappi 1.5–3 mm Hymenopappus filifolius var. nanus
11 Peduncles 1–6 cm; cypsela hairs 1–3 mm; pappi 0.6–2 mm > 12
12 Cauline leaves 0–2; cypsela hairs 1 mm; pappi 0.6–1.3 mm Hymenopappus filifolius var. idahoensis.
12 Cauline leaves (0–)2–4; cypsela hairs 1–3 mm; pappi 1.5–2 mm Hymenopappus filifolius
... more about "Hymenopappus filifolius"
not tailed +, rounded +  and obtuse +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
indeterminate +  and determinate +
John L. Strother +
Hooker +
3 cm30 mm <br />0.03 m <br /> (20 cm200 mm <br />0.2 m <br />) +
decurrent +
compound +  and simple +
toothed +
1-2+ times pinnately lobed ultimate margins usually entire +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
0 (?) +  and 12 (?) +
whitish +  and yellowish +
0.22 cm2.2 mm <br />0.0022 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
less hirtellous +  and villous +
obpyramidal +
fertile +  and bisexual +
fertile +  and bisexual +
Alta. +, Sask. +, Ariz. +, Calif. +, Colo. +, Idaho +, Kans. +, Mont. +, N.Dak. +, N.Mex. +, Nebr. +, Nev. +, Oreg. +, S.Dak. +, Tex. +, Utah +, Wash. +, Wyo. +  and n Mexico +
tomentose +, hairy +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
discoid +  and radiate +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.4 cm4 mm <br />0.004 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
obconic;hemispheric +
cauline +  and basal +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
deltate +  and filiform +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (?) +  and 0.2 cm2 mm <br />0.002 m <br /> (?) +
dentate to pinnatifid or palmatifid +  and entire +
2-carpellate +
persistent +
of 12 +  and 22 orbiculate to spatulate scales +
1 cm10 mm <br />0.01 m <br /> (16 cm160 mm <br />0.16 m <br />) +
scarious-margined +
0.3 cm3 mm <br />0.003 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
5 +  and 13 +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Fl. Bor.-Amer. +
bearing subulate enations +, hairy +  and bristly +
convex;flat +
12 +  and 22 +
orbiculate +  and spatulate +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
exalbuminous +
Illustrated +
scapiform +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Compositae +
Hymenopappus filifolius +
Hymenopappus +
species +
2-8 times lobes +
campanulate +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
toothed +  and entire +
5 cm50 mm <br />0.05 m <br /> (20 cm200 mm <br />0.2 m <br />) +
5 cm50 mm <br />0.05 m <br /> (10 cm100 mm <br />0.1 m <br />) +
tree +, shrub +  and subshrub +