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FNA | Family List | FNA Vol. 7 | Brassicaceae | Physaria

40. Physaria hitchcockii (Munz) O’Kane & Al-Shehbaz, Novon. 12: 324. 2002.

Hitchcock’s bladderpod

Lesquerella hitchcockii Munz, Bull. Torrey Bot. Club 56: 163. 1929

Perennials; (forming loose mats); caudex (buried), branched; densely pubescent, trichomes (short-stalked), 4-6-rayed, rays distinct, bifurcate, (rough-tuberculate). Stems few to several from base, prostrate to erect or spreading, 0.05-0.5(-1.2) dm. Basal leaves: (petiole and blade differentiated or not); blade spatulate to elliptic or linear or narrowly oblanceolate, 0.5-1.5 (-2.5) cm, margins entire. Cauline leaves similar to basal, smaller. Racemes dense. Fruiting pedicels (ascending, straight or slightly curved), 2-6 mm. Flowers: sepals narrowly lanceolate to lanceolate, 2.8-6 mm; petals (pale to deep yellow), narrowly lanceolate to oblanceolate, 5-9 mm, (claw undifferentiated from blade). Fruits (sessile or substipitate), globose or subglobose to obovoid, not or slightly inflated, 3-6 mm, (firm, apex acute); valves (reddish in age, not retaining seeds after dehiscence), glabrous throughout; replum as wide as or wider than fruit; ovules 4-8 per ovary; style 1.7-6 mm. Seeds flattened.

Subspecies 3 (3 in the flora): w United States.

1 Caudices elongated and elastic; basal leaves: petiole not differentiated from blade, blades linear-oblanceolate; Aquarius, Markagunt, and Paunsaugunt plateaus, Utah (limited to the pink member of the limestone Wasatch (Claron) Formation).   40c Physaria hitchcockii subsp. rubicundula
+ Caudices elongated or not, elastic or not; basal leaves: petiole differentiated (sometimes weakly) from blade, blades oblanceolate to obovate; Nevada, Utah   (2)
2 (1) Plants forming tufts; caudices not elongated, not elastic; fruits 2.6-3.8 mm wide; Table Cliff Plateau, Utah (limited to the white member of the limestone Wasatch (Claron) Formation) and limestones of the Sheep Range and Spring Mountains, Nevada.   40a Physaria hitchcockii subsp. hitchcockii
+ Plants forming soft mats; caudices elongated, elastic (creeping); fruits 1.7-3 mm wide; Grant, Quinn Canyon, and Schell Creek ranges, Nevada.   40b Physaria hitchcockii subsp. confluens

Lower Taxa


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