Xylorhiza cognata
Brittonia 29: 204. 1977.
Common names: Mecca woody-aster
EndemicConservation concern
Basionym: Aster cognatus H. M. Hall Univ. Calif. Publ. Bot. 6: 173. 1915
Synonyms: Machaeranthera cognata (H. M. Hall) Cronquist & D. D. Keck
Shrubs, 50–150 cm. Stems branched to near apices, glabrescent (younger stems and branches stipitate-glandular). Leaf-blades spatulate to ovate, 3–20 mm wide, bases attenuate, subclasping, margins flat, coarsely spinulose-toothed, faces glabrous, sparsely stipitate-glandular. Peduncles 5–11 (–20) cm. Involucres 15–20 × 20–40 mm. Phyllaries loosely appressed, outermost (at least margins) stipitate-glandular, innermost shorter than mid. Ray-florets (12–) 20–29 (–32); corollas light blue to violet. Style-branch appendages shorter than stigmatic lines. 2n = 12.
Phenology: Flowering Jan–Apr(–Jun).
Habitat: Slopes and bottoms of deep ravines in clay, rocky sand, and gravel
Elevation: 20–300 m
Discussion
Of conservation concern.
Xylorhiza cognata is known only from Riverside County.
Selected References
None.
Lower Taxa
None.
... more about "Xylorhiza cognata"
introrse +
connate +
distinct +
herbaceous +
scarious +
hirsute +
papillate +
continuous +
subclasping +
attenuate +
1-nerved +
linear;lanceolate or oblanceolate oblong or narrowly elliptic +
ribbed +
stigmatic +
barbellate +
tawny +
persistent +
30;45 +
unequal +
absent +
Mecca woody-aster +
absent +
monomorphic +
4-ribbed +
dimorphic +
staminate +
Calif. +
straight +
distinct +
proximal +
1;5 +
bisexual +
dispersed +
singly +
indeterminate +
surrounding +
campanulate;hemispheric +
spatulate;ovate +
3mm;20mm +
alternate +
cauline +
spreading +
triangular +
spinulose-toothed +
scarious +
stipitate-glandular +
2-carpellate +
inferior +
attached +
anatropous +
persistent +
tough +
thick +
absent +
connate +
1-nerved +
persistent +
appressed +
distinct +
falling +
lanceolate +
unequal +
Brittonia +
1977 +
pistillate +
absent +
fertile +
epaleate +
pitted +
concave;usually flat;conic +
fibrous +
exalbuminous +
modifed +
2;3 +
alternate +
branched +
erect +
glabrescent +
lanceolate +
2-branched +
glabrous +
Xylorhiza cognata +
Xylorhiza +
species +
shorter +
shorter to longer +
perennial +