Athysanus unilateralis |
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heterodraba, ladiestongue mustard, spreading athysanus |
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Habit | Plants pubescent. |
Stems | (0.3–)0.7–2.5(–3.5) dm. |
Basal leaves | subsessile or petiole to 0.3 cm; blade oblanceolate, obovate, or oblong, (0.3–)0.7–2(–2.2) cm × (2–)4–7 mm, margins entire or with a tooth on each side, apex obtuse, surfaces uniformly pubescent, trichomes cruciform with fewer, 3-rayed ones. |
Cauline leaves | 2–5; blade similar to but smaller than basal, (base cuneate, not auriculate). |
Flowers | sepals 0.6–1 × 0.4–0.6 mm; petals spatulate, 1.3–1.7 × 0.5–0.8 mm; filaments 0.5–0.9 mm; anthers 0.1–0.2 mm. |
Fruiting pedicels | stout, 1–2(–3) mm. |
Fruits | elliptic, obovate, or orbicular, flattened or slightly twisted; valves thickened, veins often prominent, glabrous or uniformly pubescent, trichomes subsessile or short-stalked, cruciform and 3-rayed, sometimes mixed with stouter, simple or forked, subsetiform ones to 0.6 mm, not hooked; septum complete, (membranous); ovules 6–12 per ovary; style 0.1–0.2 mm. |
Seeds | often 2 or more, 0.9–1.2 × 0.6–0.8 mm. |
Athysanus unilateralis |
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Phenology | 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 (300-3000 ft) |
Distribution |
CA; OR; Mexico (Baja California)
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Discussion | It appears that Athysanus unilateralis is known in Oregon only from Jackson County; it is more widespread in California. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 7, p. 268. |
Parent taxa | |
Sibling taxa | |
Synonyms | Draba unilateralis, Heterodraba unilateralis |
Name authority | (M. E. Jones) Jepson: Fl. W. Calif., 224. (1901) |
Web links |