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FOC | Family List | FOC Vol. 10 | Fabaceae | Oxytropis

108. Oxytropis humifusa Karelin & Kirilov, Bull. Soc. Imp. Naturalistes Moscou. 15: 535. 1842.

铺地棘豆 pu di ji dou

Oxytropis albana Steven; O. humifusa var. grandiflora Bunge; O. lapponica (Wahlenberg) Gay var. humifusa (Karelin & Kirilov) Baker; O. lapponica var. jacquemontiana Bentham ex Baker; O. melanotricha Bunge.

Herbs, 2-5(-8) cm tall, acaulescent, from a multiheaded shortly branched caudex, low tuft-forming. Stipules lanceolate with a lanceolate-subulate free part ca. 5 mm, 1-1.2 cm, mem­branous to leathery, persistent, sericeous with dense long tri­chomes or glabrous, adnate to petiole. Leaves 2-7 cm, 13-17(-21)-foliolate; petiole and rachis with appressed trichomes; leaf­let blades ovate-lanceolate to lanceolate, 3-8 × 2-3 mm, appressed sericeous with long trichomes, apex acute. Racemes rather compact, 6-10-flowered; peduncle 2-5(-8) cm, to 2 × as long as leaves, thin, erect to diffuse, with sparse white short trichomes; bracts linear-subulate, 4-5 mm, with white and black trichomes. Calyx campanulate, 5-6 mm, with dense black short and white long trichomes; lobes linear-subulate, ca. 2 mm. Co­rolla purple; standard 0.8-1.3 cm, lamina obcordate, apex emar­ginate; wings 7-10 mm, apex 2-lobed; keel as long as wings, beak ca. 0.5 mm. Legume stipitate; stipe 3-4 mm; body cylin­dric-ovoid, 1.3-2.5 × 0.4-0.6 cm, pendulous, membranous, 1-locular, with appressed white and black trichomes. Fl. Jul-Aug, fr. Aug-Sep.

Sunny S-facing slopes, floodplains, gravelly areas in valleys; 4000-4400 m. Xinjiang, Xizang [Afghanistan, India, Kashmir, Kazakh­stan, Kyrgyzstan, Nepal, Pakistan, Tajikistan, Turkmenistan, Uzbeki­stan].


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