Hymenopappus artemisiifolius
in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 5: 658. 1836.
Endemic
Revision as of 22:47, 29 July 2020 by imported>Volume Importer
Biennials, 40–100 cm. Leaves: basal simple (5–20+ mm wide) or 1-pinnate, 8–20 cm, lobes 5–20+ × 1–5 (–20+) mm; cauline 2–16. Heads 20–60 per stem. Peduncles 1–6 cm. Phyllaries whitish (sometimes red-tinged) or yellowish, 5–12 × 2–7 mm. Ray-florets 0. Disc-florets 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. Cypselae 3.5–5 mm, hirtellous or villous; pappi of 16–18 scales 0.3–1 (–1.5) or 1.5–2 mm.
Distribution
Ark., La., Tex.
Discussion
Varieties 2 (2 in the flora).
Selected References
None.
Lower Taxa
Key
| 1 | Cauline leaves (6–)8–16; phyllaries 6–12 mm; corollas whitish to purplish; pappi 0.3–1(–1.5) mm | Hymenopappus artemisiifolius var. artemisiifolius |
| 1 | Cauline leaves 2–8; phyllaries 5–7 mm; corollas yellowish to reddish; pappi 1.5–2 mm | Hymenopappus artemisiifolius var. riograndensis |
... more about "Hymenopappus artemisiifolius"
introrse +
connate +
herbaceous +
scarious +
absent +
hirsute +
papillate +
corymbiform +
continuous +
decurrent +
toothed +
1-2+ times pinnately lobed ultimate margins usually entire +
winged;ribbed;winged;ribbed +
1;15 +
stigmatic +
absent +
zygomorphic +
monomorphic +
12-16-ribbed +
dimorphic +
obpyramidal +
3.5mm;5mm +
staminate +
straight +
distinct +
proximal +
1;5 +
bisexual +
dispersed +
singly +
discoid +
aggregated +
indeterminate +
20;60 +
surrounding +
obconic;hemispheric +
petiolate +
alternate +
2-carpellate +
inferior +
attached +
anatropous +
persistent +
falling +
absent +
tough +
thick +
absent +
connate +
scarious-margined +
persistent +
distinct +
falling +
subequal +
in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. +
1836 +
pistillate +
absent +
fertile +
epaleate +
convex;flat +
fibrous +
exalbuminous +
modifed +
2;3 +
Endemic +
alternate +
erect +
scapiform +
2-branched +
papillate +
Hymenopappus artemisiifolius +
Hymenopappus +
species +
1-1.5 times lobes +
equaling +
longer +
biennial +