Isocoma arguta
Man. Bot. San Francisco, 175. 1894.
Common names: Contra Costa jimmyweed Carquinez or suisun goldenbush
EndemicConservation concern
Synonyms: Haplopappus venetus var. argutus (Greene) D. D. Keck
Herbage glabrous or minutely hispidulous, stipitate-glandular. Leaf-blades oblong-obovate, 10–25 mm, margins serrate to lobed (teeth or lobes in 3–5 even pairs, spinulose-aristate). Involucres 5–7 × 4–5 mm. Phyllary apices greenish, spinulose-aristate, densely and promently gland-dotted, glands often coalesced as small resin pockets. Florets 10–13; corollas 4–5 mm. Cypsela ribs not forming apical horns.
Phenology: Flowering Aug–Oct.
Habitat: Low hills, alkaline and subsaline plains, alkali marshes, stream benches, grasslands, fencelines
Elevation: 0–20(–50) m
Discussion
Of conservation concern.
Isocoma arguta is known only from Contra Costa and Solano counties.
Selected References
None.
Lower Taxa
None.
"thick" is not a number.
... more about "Isocoma arguta"
introrse +
connate +
green +
distinct +
herbaceous +
scarious +
hirsute +
papillate +
continuous +
decurrent +
oblong-obovate +
1-nerved +
linear;oblanceolate or obovate +
ribbed +
cluster +
stigmatic +
barbellate +
persistent +
40;50 +
unequal +
absent +
yellow +
absent +
monomorphic +
5-11-ribbed +
dimorphic +
staminate +
Calif. +
straight +
gland-dotted;gland-dotted +
distinct +
proximal +
10;13 +
bisexual +
dispersed +
coalesced +
Low hills, alkaline and subsaline plains, alkali marshes, stream benches, grasslands, fencelines +
discoid +
singly +
indeterminate +
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 +
spinulose-aristate +
Man. Bot. San Francisco, +
1894 +
absent +
sterile +
epaleate +
pitted +
concave;usually flat;conic +
small +
fibrous +
exalbuminous +
modifed +
2;4;6 +
alternate +
resinous +
gland-dotted +
erect +
triangular +
2-branched +
glabrous +
Isocoma arguta +
Isocoma +
species +
corymbiform +
goblet--shaped +
ampliate +
longer +
dark orange-resinous +
perennial +
subshrub +