Difference between revisions of "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
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|tribe=Asteraceae tribe Astereae | |tribe=Asteraceae tribe Astereae | ||
|genus=Xylorhiza | |genus=Xylorhiza | ||
Latest revision as of 21:06, 5 November 2020
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.