Physaria arctica(Wormsk. ex Hornem.) O'Kane & Al-Shehbaz
No occurrences found
Family: Brassicaceae
arctic bladderpod
[Lesquerella arctica (Wormsk. ex Hornem.) S. Watson, moreLesquerella arctica subsp. purshii (S. Watson) A. E. Porsild, Lesquerella arctica var. purshii S. Watson, Lesquerella arctica var. scammaniae Rollins, Lesquerella purshii (S. Watson) Fernald]
Perennials; caudex simple or branched, (woody, cespitose); ± densely pubescent, trichomes (sessile or short-stalked), several-rayed, rays distinct, furcate or bifurcate, (somewhat umbonate, finely tuberculate to ± smooth). Stems simple or few to several from base, erect to spreading or prostrate, 0.5-2(-3) dm. Basal leaves (usually ± rosulate); blade obovate to oblanceolate, (1-)2-6(-15) cm, margins entire. Cauline leaves (sessile or shortly petiolate); blade oblanceolate or lingulate, 0.5-1.5(-3) cm, margins entire. Racemes loose. Fruiting pedicels (erect to divaricate or ascending), (5-)10-20(-40) mm, (stout). Flowers: sepals ovate to elliptic, (3-)4-5(-6) mm, (median pair often thickened apically, cucullate); petals spatulate, 5-6(-7) mm, (blade gradually narrowed to claw). Fruits subglobose to ellipsoid, uncompressed, 4-6(-9) mm; valves (not retaining seeds after dehiscence), glabrous or sparsely pubescent outside, trichomes sessile; replum as wide as or wider than fruit; ovules (8-)10-14(-16) per ovary; style 1-2.5(-4) mm. Seeds plump. 2n= 60. Flowering May-Aug. Typically on sand and gravel from calcareous bedrock, river bars and terraces, cliff ledges, scree and talus slopes, often growing after disturbance; 0-1800 m; Greenland; Alta., B.C., Man., Nfld. and Labr., N.W.T., Nunavut, Que., Yukon; Alaska; circumarctic (except n Europe, ne Russia).