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Athysanus unilateralis (M.E. Jones) Jeps. Search in The Plant ListSearch in IPNISearch in Australian Plant Name IndexSearch in NYBG Virtual HerbariumSearch in Muséum national d'Histoire naturelleSearch in Type Specimen Register of the U.S. National HerbariumSearch in Virtual Herbaria AustriaSearch in JSTOR Plant ScienceSearch in SEINetSearch in African Plants Database at Geneva Botanical Garden Decrease font Increase font Restore font
 

Published In: A Flora of Western Middle California 224. 1901. (Fl. W. Calif.) Name publication detail
 

Project Name Data (Last Modified On 7/21/2009)
 

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2. Athysanus unilateralis (M. E. Jones) Jepson, Fl. W. Calif., 224. 1901; Draba unilateralis M. E. Jones, Bull. Torrey Bot. Club 9: 124. 1882; Heterodraba unilateralis (M. E. Jones) Greene, Bull. Calif. Acad. Sci. 1: 72. 1885. TYPE: Mexico, [Baja California], Valley of Palms, 7 Apr 1882, Marcus E. Jones 3687 (holotype, POM; isotypes, NY!, 3US!).

Herbs, pubescent. Stems (0.3–)0.7–2.5(–3.5) dm. Basal leaves subsessile or with petioles to 3 mm, oblanceolate, obovate, or oblong, entire or with a tooth on each side, apex obtuse, (3–)7–20(–22) x (2–)4–7 mm, uniformly pubescent on both surfaces with cruciform and much fewer 3-rayed trichomes; cauline leaves 2–5, similar but smaller than basal ones, cuneate, not auriculate. Fruiting pedicels stout, 1–2(–3) mm. Sepals oblong, 0.6–1 x 0.4–0.6 mm; petals white, 1.3–1.7 x 0.5–0.8 mm; filaments 0.5–0.9 mm; anthers 0.1–0.2 mm; ovules 6–12 per ovary. Fruits elliptic, obovate, or orbicular, latiseptate, wingless, indehiscent or tardily dehiscent, flat or slightly twisted; valves thickened, often with prominent veins, glabrous or uniformly pubescent with subsessile or short-stalked cruciform and 3-rayed trichomes, these sometimes mixed with stouter and subsetose simple or forked, subsetose trichomes to 0.6 mm; septum complete, membranous; style 0.1–0.2 mm. Seeds often 2 or more, brown, 0.9–1.2 x 0.6–0.8 mm.

Flowering: Feb–May.

Habitat: open grassy slopes and flats, friable clay, flood plains, adobe and heavy gumbo clay, gypsum clay slopes.

Elevation: 100–900 m.

Distribution:  Mexico (Baja California), United States (California, SW Oregon/Jackson Co.).

 

 


 

 
 
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