Physaria densiflora

(A. Gray) O’Kane & Al-Shehbaz

Novon 12: 322. 2002.

Common names: Denseflower or low bladderpod
Basionym: Vesicaria densiflora A. Gray Boston J. Nat. Hist. 6: 145. 1850
Synonyms: Lesquerella densiflora (A. Gray) S. Watson
Treatment appears in FNA Volume 7. Treatment on page 633. Mentioned on page 619.

Annuals or biennials; caudex simple or branched, (relatively small, cespitose); densely pubescent, trichomes (spreading, sessile or short-stalked), 5–7-rayed, rays distinct and simple, (tuberculate, finely tubercled with a U-shaped notch on one side). Stems simple or few to several from base, erect or decumbent, (rarely branched, usually leafy), to 4 dm. Basal leaves: blade lyrate-pinnatifid, 1–7 cm, margins entire or shallowly dentate. Cauline leaves (sessile or shortly petiolate); blade narrowly obovate to elliptic, 0.5–6 cm, margins entire, repand, or shallowly dentate. Racemes dense, (elongated in fruit, often subtended by distal cauline leaves). Fruiting pedicels (usually divaricate-spreading, straight or slightly curved, delicate, sometimes drooping, especially on herbarium specimens), 7–10 mm, (somewhat rigid). Flowers: sepals elliptic, 3.7–7.2 mm, (lateral pair somewhat cucullate, median pair thickened apically); petals (yellow to orange-yellow), obovate to obdeltate, (4.5–)7–10(–11) mm, (tapering to short claw, apex often emarginate). Fruits (sessile or substipitate), globose or broadly obovate, not inflated, 4–6 mm, (smooth); valves (not retaining seeds after dehiscence), glabrous; replum as wide as or wider than fruit; ovules 8–16 per ovary; style 2–5 mm. Seeds flattened. 2n = 14.

Phenology: Flowering Mar–May.
Habitat: Sandy, granitic, or calcareous soils, sandy ledges, limestone outcrops, rocky prairies, uplands
Elevation: 30-400 m


Alyssum densiflorum (A. Gray) Kuntze (1891), not Desfontaines (1808) is an illegitimate name, sometimes found in synonymy with Physaria densiflora.

Selected References


Lower Taxa

... more about "Physaria densiflora"
Steve L. O’Kane Jr. +
(A. Gray) O’Kane & Al-Shehbaz +
Vesicaria densiflora +
Denseflower or low bladderpod +
30-400 m +
Sandy, granitic, or calcareous soils, sandy ledges, limestone outcrops, rocky prairies, uplands +
Flowering Mar–May. +
Lesquerella densiflora +
Physaria densiflora +
Physaria +
species +