Isocoma acradenia var. bracteosa
Phytologia 70: 81. 1991.
Endemic
Basionym: Isocoma bracteosa Greene Leafl. Bot. Observ. Crit. 1: 170. 1906
Synonyms: Haplopappus acradenius subsp. bracteosus (Greene) H. M. Hall
Leaf-blades mostly 50–150 mm, margins of proximal usually shallowly toothed, of distal entire or serrulate. Involucres 7–8 mm. Phyllary apices spinulose-aristate. Florets 20–27.2n = 12.
Phenology: Flowering Aug–Oct.
Habitat: Salt flats
Elevation: 0–20 m
Discussion
In the limited zone of contact between vars. bracteosa and acradenia, intermediates are rare. The two differ in chromosome number and significantly in habitat (altitudes are essentially non-overlapping). Field studies may show them to warrant distinction at specific rank.
Selected References
None.
Lower Taxa
None.
"thick" is not a number.
... more about "Isocoma acradenia var. bracteosa"
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 +
lateral +
smaller +
yellow +
absent +
monomorphic +
5-11-ribbed +
dimorphic +
staminate +
Calif. +
straight +
gland-dotted;gland-dotted +
distinct +
proximal +
20;27 +
bisexual +
dispersed +
discoid +
singly +
indeterminate +
resinous +
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 +
Phytologia +
1991 +
absent +
sterile +
epaleate +
pitted +
concave;usually flat;conic +
developed +
single +
fibrous +
exalbuminous +
modifed +
2;4;6 +
Endemic +
alternate +
resinous +
gland-dotted +
erect +
triangular +
2-branched +
glabrous +
Isocoma acradenia var. bracteosa +
Isocoma acradenia +
variety +
corymbiform +
goblet--shaped +
ampliate +
proximal +
toothed +
longer +
dark orange-resinous +
perennial +
subshrub +