Oönopsis multicaulis
Pittonia 3: 45. 1896.
Common names: Yellow-rayed or branched goldenweed
Basionym: Stenotus multicaulis Nuttall Trans. Amer. Philos. Soc., n. s. 7: 335. 1840
Synonyms: Haplopappus multicaulis (Nuttall) A. Gray Oönopsis argillacea A. Nelson
Treatment appears in FNA Volume 20. Treatment on page 411.
Plants 2–11 (–14) cm. Stems sparsely villosulous, glabrescent at maturity. Leaf-blades linear to linear-oblanceolate, 7–85 × 0.8–4.2 (–5) mm, cauline bases not auriculate or clasping, distalmost abruptly reduced in size. Heads not immediately subtended by leafy bracts. Involucres 6–10 mm. Phyllary apices abruptly acute to obtuse, apiculate to cuspidate. Ray-florets 5–11. Disc-florets 12–25. Cypselae 2.8–4 mm, faces tomentose. 2n = 8.
Phenology: Flowering Jun–Jul(–Aug).
Habitat: Barren selenium and/or alkaline hills and flats, loose shaley, clay-shale, and sandy-clay soil, pastures, eroded clay pans in mid-grass prairie with Artemisia, sometimes with Atriplex
Elevation: 1100–1900 m
Distribution
Mont., Nebr., S.Dak., Wyo.
Discussion
Oönopsis multicaulis grows in Carter County in Montana, Dawes and Sioux counties in Nebraska, Butte and Fall River counties in South Dakota, and Campbell, Carbon, Converse, Crook, Fremont, Johnson, Natrona, Niobrara, Platte, and Weston counties in Wyoming.
Selected References
None.
Lower Taxa
None.
... more about "Oönopsis multicaulis"
introrse +
connate +
distinct +
herbaceous +
scarious +
hirsute +
papillate +
continuous +
decurrent +
linear;narrowly oblanceolate or lanceolate +
ribbed +
leafy +
stigmatic +
ciliate-barbellate +
brownish +
persistent +
15;30 +
unequal +
absent +
not auriculate +
Yellow-rayed or branched goldenweed +
yellow +
absent +
monomorphic +
5(-8)-ribbed +
dimorphic +
2.8mm;4mm +
staminate +
reduced +
straight +
tomentose +
distinct +
proximal +
1;5 +
bisexual +
dispersed +
Barren selenium and/or alkaline hills and flats, loose shaley, clay-shale, and sandy-clay soil, pastures, eroded clay pans in mid-grass prairie with Artemisia, sometimes with Atriplex +
singly +
indeterminate +
chartaceous +
surrounding +
hemispheric;campanulate or cylindro-turbinate +
linear;linear-oblanceolate +
0.8mm;4.2mm +
sessile +
alternate +
cauline +
erect +
not scarious +
herbaceous +
2-carpellate +
inferior +
attached +
anatropous +
persistent +
tough +
thick +
absent +
connate +
1-nerved +
persistent +
distinct +
falling +
Pittonia +
1896 +
pistillate +
absent +
fertile +
epaleate +
pitted +
convex +
fibrous +
exalbuminous +
modifed +
1;2 +
alternate +
erect +
triangular +
2-branched +
glabrous +
Oönopsis multicaulis +
Oönopsis +
species +
shorter +
perennial +