Physaria tenella

(A. Nelson) O’Kane & Al-Shehbaz

Novon 12: 328. 2002.

Common names: Moapa bladderpod
Basionym: Lesquerella tenella A. Nelson Bot. Gaz. 47: 426. 1909
Synonyms: Lesquerella gordonii var. sessilis S. Watson
Treatment appears in FNA Volume 7. Treatment on page 663. Mentioned on page 622.

Annuals or, rarely, biennials; with a taproot; densely pubescent, trichomes (simple or stellate, sessile or short-stalked), 4–7-rayed, rays usually furcate, rarely bifurcate, (nearly smooth to finely tuberculate). Stems several from base, decumbent to erect, (several-branched, frequently stout), 1.5–6 dm. Basal leaves: blade elliptic, (1.5–)3–6.5 cm, margins entire, repand, or shallowly dentate. Cauline leaves: (proximal shortly petiolate, distal sessile); blade linear to elliptic or obovate, (0.5–)1–3.5(–4.5) cm, margins entire or repand. Racemes loose. Fruiting pedicels (recurved, sigmoid), 5–15 mm. Flowers: sepals oblong, lanceolate, or elliptic, (3–)3.5–6(–7.5) mm, (lateral pair subsaccate, median pair thickened apically, cucullate); petals (yellow to orange), suborbicular or obovate, (5–)6.5–8(–11) mm, (narrowing gradually to broad claw, usually widened at base). Fruits (sessile or shortly stipitate), orbicular or obovoid, often slightly compressed, (3.5–)4–6 mm; valves sparsely pubescent, trichomes sessile and stellate, densely pubescent inside, trichomes simple or branched; ovules 4–12 per ovary; style 2–4.5 mm. Seeds flattened. 2n = 10, 20.


Phenology: Flowering Feb–May.
Habitat: Sandy soils, gravel, clayey loam, loose rocky slopes, washes, desert slopes and plains, lava hills, frequently in or near bushes
Elevation: (0-)600-1900 m

Distribution

V7 1133-distribution-map.gif

Ariz., Calif., Nev., Utah, Mexico (Sonora).

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Physaria tenella"
Steve L. O’Kane Jr. +
(A. Nelson) O’Kane & Al-Shehbaz +
Lesquerella tenella +
Moapa bladderpod +
Ariz. +, Calif. +, Nev. +, Utah +  and Mexico (Sonora). +
(0-)600-1900 m +
Sandy soils, gravel, clayey loam, loose rocky slopes, washes, desert slopes and plains, lava hills, frequently in or near bushes +
Flowering Feb–May. +
Lesquerella gordonii var. sessilis +
Physaria tenella +
Physaria +
species +