Hymenopappus biennis
Rhodora 58: 256, figs. 24, 38. 1956.
Endemic
Biennials, 60–100 cm. Leaves: basal 2-pinnate, 6–16 cm, lobes 6–20 × 1 (–3) mm; cauline 10–40. Heads 20–40 per stem. Peduncles 1–6 cm. Phyllaries yellowish, 5–8 × 3–5 mm. Ray-florets 8; corollas white, laminae (6–) 14–16 mm. Disc-florets 32–50+; corollas yellowish, 3–3.5 mm, tubes 1.5 mm, throats campanulate, 1.5–2 mm, lengths 2–3 times lobes. Cypselae 4 mm, glabrous; pappi 0 or of scales 0.1–0.2 mm. 2n = 34.
Phenology: Flowering Jul–Oct.
Habitat: Limestone soils
Elevation: 2000–3000 m
Discussion
Selected References
None.
Lower Taxa
None.
... more about "Hymenopappus biennis"
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 +
monomorphic +
12-16-ribbed +
dimorphic +
glabrous +
obpyramidal +
staminate +
straight +
distinct +
proximal +
1;5 +
bisexual +
dispersed +
singly +
discoid +
aggregated +
indeterminate +
20;40 +
surrounding +
obconic;hemispheric +
petiolate +
alternate +
1 cm10 mm <br />0.01 m <br /> (?) +
2-carpellate +
inferior +
attached +
anatropous +
persistent +
falling +
absent +
of scales +
tough +
thick +
absent +
connate +
scarious-margined +
persistent +
distinct +
falling +
subequal +
Rhodora +
1956 +
pistillate +
absent +
fertile +
epaleate +
convex;flat +
fibrous +
exalbuminous +
modifed +
2;3 +
Endemic +
alternate +
erect +
scapiform +
2-branched +
papillate +
Hymenopappus biennis +
Hymenopappus +
species +
2-3 times lobes +
campanulate +
equaling +
longer +
1.5 cm15 mm <br />0.015 m <br /> (?) +
biennial +