Hymenopappus flavescens
Mem. Amer. Acad. Arts, n. s. 4: 97. 1849.
Biennials, 30–90 cm. Leaves: basal 2-pinnate, 6–15 cm, lobes 3–15 (–20+) × 1–6 mm; cauline 10–50. Heads 15–100 per stem. Peduncles 1–6 cm. Phyllaries yellowish, 4–8 × 2–4 mm. Ray-florets 0. Disc-florets 20–40; corollas yellow, 2.5–3.5 mm, tubes 1.5–2 mm, throats campanulate, 0.8–1.5 mm, lengths 1–1.5 times lobes. Cypselae 3–4.5 mm, ± villous; pappi of 16–22 scales 0.5–1.5 mm.
Distribution
Colo., Kans., N.Mex., Okla., Tex., n Mexico
Discussion
Varieties 2 (2 in the flora).
Selected References
None.
Key
| 1 | Lobes of basal leaves (1–)2–6 mm wide, abaxial faces glabrous or less hairy than adaxial; pappi 0.5–1(–1.5) mm | Hymenopappus flavescens var. flavescens |
| 1 | Lobes of basal leaves 1–2 mm wide, abaxial and adaxial faces ± equally hairy; pappi 1–1.5 mm | Hymenopappus flavescens var. canotomentosus |
... more about "Hymenopappus flavescens"
introrse +
connate +
herbaceous +
scarious +
absent +
hirsute +
papillate +
corymbiform +
continuous +
2-pinnate +
decurrent +
toothed +
1-2+ times pinnately lobed ultimate margins usually entire +
winged;ribbed;winged;ribbed +
1;15 +
stigmatic +
absent +
zygomorphic +
yellow +
monomorphic +
12-16-ribbed +
dimorphic +
villous +
obpyramidal +
3mm;4.5mm +
staminate +
straight +
distinct +
proximal +
1;5 +
bisexual +
dispersed +
singly +
discoid +
aggregated +
indeterminate +
15;100 +
surrounding +
obconic;hemispheric +
petiolate +
alternate +
2-carpellate +
inferior +
attached +
anatropous +
persistent +
falling +
absent +
tough +
thick +
absent +
connate +
scarious-margined +
persistent +
distinct +
falling +
subequal +
Mem. Amer. Acad. Arts, n. s. +
1849 +
pistillate +
absent +
fertile +
epaleate +
convex;flat +
fibrous +
exalbuminous +
modifed +
2;3 +
alternate +
erect +
scapiform +
2-branched +
papillate +
Hymenopappus flavescens +
Hymenopappus +
species +
1-1.5 times lobes +
campanulate +
equaling +
longer +
biennial +