Yermo xanthocephalus
Madroño 38: 199, fig. 1. 1991.
Common names: Desert yellow-head
IllustratedEndemicConservation concern
Treatment appears in FNA Volume 20. Treatment on page 634.
Taproots penetrating to 20–25+ cm. Stems hollow. Leaf-blades 4–25 × 1–6 cm. Peduncles 3–15 mm. Involucres 8–15 mm. Disc-florets slightly exserted from involucres; corollas: tubes 3.5 mm, throats 2.5 mm, lobes 2–3 (–3.5) mm. Cypselae 6–7 mm; pappi 5 mm.
Phenology: Flowering Jun(–Aug).
Habitat: Barren, white silty-clay
Elevation: 2000 m
Discussion
Of conservation concern.
Yermo xanthocephalus is known only from one site in central Wyoming. It is in the Center for Plant Conservation’s National Collection of Endangered Plants.
Selected References
None.
Lower Taxa
None.
... more about "Yermo xanthocephalus"
introrse +
connate +
papillate +
rounded-truncate +
scarious +
hispidulous +
papillate +
continuous +
decurrent +
3-nerved +
lanceolate;ovate or obovate +
winged;nerved;ribbed +
stigmatic +
barbellulate +
whitish +
persistent +
absent +
Desert yellow-head +
not 2-lipped +
yellow +
monomorphic +
10-ribbed +
short-hairy +
6mm;7mm +
staminate +
Wyo. +
straight +
glabrous +
distinct +
proximal +
1;5 +
bisexual +
dispersed +
discoid +
singly +
indeterminate +
Present +
surrounding +
cylindric +
1cm;6cm +
petiolate +
alternate +
spreading +
? (?) +
scarious +
2-carpellate +
inferior +
attached +
anatropous +
falling +
5 cm50 mm <br />0.05 m <br /> (?) +
tough +
thick +
absent +
connate +
persistent +
distinct +
herbaceous +
falling +
erect +
equal +
Madroño +
1991 +
absent +
epaleate +
conic;usually flat;convex +
fibrous +
exalbuminous +
modifed +
1;2 +
alternate +
hollow +
clustered +
erect +
single +
continuous +
2-branched +
glabrous +
papillate +
Yermo xanthocephalus +
Yermo +
species +
2.5 cm25 mm <br />0.025 m <br /> (?) +
longer +
3.5 cm35 mm <br />0.035 m <br /> (?) +
perennial +