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

45. Physaria klausii (Rollins) O’Kane & Al-Shehbaz, Novon. 12: 325. 2002.

Rogers Pass or Klaus’s or Divide bladderpod

Lesquerella klausii Rollins, Contr. Gray Herb. 214: 10. 1984

Perennials; caudex simple; densely pubescent, trichomes (loosely spreading), 3-5-rayed, rays distinct, furcate (with exceptionally long branches). Stems simple from base, erect to decumbent, (slender), 0.6-1.5 dm. Basal leaves: blades obovate to deltate, 1.5-3(-4) cm, margins entire or outer one with 1 or 2 broad teeth. Cauline leaves: blade oblanceolate to spatulate, 0.6-1.5 cm, margins entire. Racemes loose. Fruiting pedicels (sigmoid), 5-9 mm. Flowers: sepals (green-yellow, often tinged with purple), elliptic, 3-4.6 mm; petals oblanceolate, 6-8 mm (claw expanded). Fruits (depressed), broadly obovate, compressed (angustiseptate), 2-4 mm, (apex slightly bilobed to nearly truncate); valves densely pubescent, trichomes strongly ascending, spreading, long, (appearing fuzzy), pubescent inside; ovules 4 per ovary; style 3-4 mm, (pubescent or glabrous). Seeds flattened.

Flowering Jul. Open gravel slides, solifluction cross-stripes of shale rubble, barren shale-derived soil; of conservation concern; 1200-1900 m; Mont.


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