Xylorhiza tortifolia var. imberbis
Brittonia 29: 211. 1977.
Common names: Smooth Mojave woody-aster
Endemic
Basionym: Machaeranthera tortifolia var. imberbis Cronquist Leafl. W. Bot. 10: 12. 1963
Stems, leaves, and involucres glabrous, stipitate-glandular. Leaf margins sparsely piloso-villous to puberulent. 2n = 12.
Phenology: Flowering Apr–May(–Jun).
Habitat: Sandy or gravelly slopes and flats, in pinyon-juniper, sagebrush, and blackbrush zones
Elevation: 600–1900 m
Distribution
Ariz., Nev., Utah.
Discussion
The geographic distribution of var. imberbis usually follows the canyons of the Colorado River of Utah and adjacent Arizona at least to Toroweap Point; it also occurs in Clark and Nye counties, Nevada, where it intergrades with var. tortifolia (A. Cronquist 1994).
Selected References
None.
Lower Taxa
None.
... more about "Xylorhiza tortifolia var. imberbis"
introrse +
connate +
distinct +
herbaceous +
scarious +
hirsute +
papillate +
continuous +
subclasping +
not clasping +
attenuate +
1-nerved +
linear;lanceolate or oblanceolate oblong or narrowly elliptic +
ribbed +
stigmatic +
barbellate +
tawny +
persistent +
30;45 +
unequal +
absent +
Smooth Mojave woody-aster +
white +
lavender +
absent +
monomorphic +
4-ribbed +
dimorphic +
staminate +
straight +
distinct +
proximal +
1;5 +
bisexual +
dispersed +
singly +
indeterminate +
surrounding +
campanulate;hemispheric +
lanceolate;elliptic-oblong or oblanceolate +
3mm;20mm +
alternate +
cauline +
spreading +
triangular +
spinulose-toothed +
scarious +
2-carpellate +
inferior +
attached +
anatropous +
persistent +
tough +
thick +
absent +
connate +
1-nerved +
persistent +
distinct +
falling +
lanceolate +
unequal +
Brittonia +
1977 +
pistillate +
absent +
fertile +
epaleate +
pitted +
concave;usually flat;conic +
fibrous +
exalbuminous +
modifed +
2;3 +
Endemic +
alternate +
branched +
erect +
lanceolate +
2-branched +
glabrous +
Xylorhiza tortifolia var. imberbis +
Xylorhiza tortifolia +
variety +
shorter +
shorter to longer +
perennial +
subshrub +