Isocoma rusbyi
Leafl. Bot. Observ. Crit. 1: 170. 1906.
Common names: Rusby’s jimmyweed
Endemic
Synonyms: Haplopappus rusbyi (Greene) Cronquist
Revision as of 19:56, 29 July 2020 by imported>Volume Importer
Herbage glabrous, not resinous. Leaf-blades narrowly elliptic-oblong to elliptic-obovate, 20–50 mm, margins entire. Involucres (5.5–) 6–9.5 × 5–7.5 mm. Phyllary apices yellowish to greenish yellow, not aristate, sparsely or not at all gland-dotted, without resin pockets. Florets 19–25; corollas 5–6.5 mm. Cypsela ribs slightly surpassing apices, forming hornlike extensions. 2n = 12.
Phenology: Flowering Aug–Oct(–Nov).
Habitat: Rocky or sandy soils, sometimes in clay, usually saline, desert shrub communities, sometimes with scattered junipers
Elevation: 700–1500 m
Distribution
Ariz., Colo., N.Mex., Utah.
Discussion
Selected References
None.
Lower Taxa
None.
"thick" is not a number.
... more about "Isocoma rusbyi"
introrse +
connate +
green +
distinct +
herbaceous +
scarious +
hirsute +
papillate +
continuous +
decurrent +
1-nerved +
linear;oblanceolate or obovate +
ribbed +
cluster +
stigmatic +
barbellate +
persistent +
40;50 +
unequal +
absent +
Rusby’s jimmyweed +
yellow +
absent +
monomorphic +
5-11-ribbed +
dimorphic +
staminate +
straight +
hornlike +
gland-dotted;gland-dotted +
distinct +
proximal +
19;25 +
bisexual +
dispersed +
Rocky or sandy soils, sometimes in clay, usually saline, desert shrub communities, sometimes with scattered junipers +
discoid +
singly +
indeterminate +
not resinous +
glabrous +
surrounding +
obconic;turbinate or campanulate +
sessile +
alternate +
cauline +
erect +
deltate +
scarious +
2-carpellate +
inferior +
attached +
anatropous +
persistent +
tough +
thick +
absent +
connate +
1-nerved +
persistent +
distinct +
falling +
unequal +
not aristate +
Leafl. Bot. Observ. Crit. +
1906 +
absent +
sterile +
epaleate +
pitted +
concave;usually flat;conic +
fibrous +
exalbuminous +
modifed +
2;4;6 +
Endemic +
alternate +
resinous +
gland-dotted +
erect +
triangular +
2-branched +
glabrous +
Isocoma rusbyi +
Isocoma +
species +
corymbiform +
goblet--shaped +
ampliate +
longer +
dark orange-resinous +
perennial +
subshrub +