Oxytropis sect. Orobia in Flora of China @ efloras.org

17. Oxytropis sect. Orobia Bunge, Mém. Acad. Imp. Sci. Saint Pétersbourg, sér. 7. 22(1): 73. 1874.

大花棘豆组 da hua ji dou zu

Herbs, 3-25 cm tall, acaulescent. Leaves imparipinnate; leaflets not verticillate; leaflet blades pubescent on both surfaces but often adaxially sparingly so. Racemes 2-11-flowered or more; peduncle 2-15(-18) cm. Corolla of various colors, 0.5-2 cm. Legume subsessile or with a stipe to 5 mm; body cylindric, ovoid, or oblong-ovoid, 0.5-4 cm, erect, exserted from calyx, 1-locular to nearly 2-locular, with developed abaxial and adaxial (or only adaxial) septa.

About 70 species: Asia, Europe, North America; seven species (two endemic) in China.

1 Corolla white or yellow, sometimes purplish violet, standard 1.7-2 cm; leaves 19-25 cm. 122 O. argentata

+ Corolla purple, pale pink, blue, bluish purple, violet, or white, standard 0.5-1.3(-2) cm; leaves 1.5-12 cm (2)

2 (1) Calyx ca. 3 mm; peduncle shorter than leaves; legume sessile. 123 O. malloryana

+ Calyx 3-12 mm; peduncle longer than leaves; legume with a stipe ca. 5 mm or less (3)

3 (2) Corolla standard 1.5-2 cm; legume stipe ca. 5 mm. 127 O. rupifraga

+ Corolla standard 0.5-1.3 cm; legume stipe 3 mm or less (4)

4 (3) Corolla standard 0.9-1.3 cm, wings apically rounded. 128 O. immersa

+ Corolla standard (0.5-)0.6-1 cm, wings apically emarginate (5)

5 (4) Peduncle 4-15 cm, 3-4 × as long as leaves; legume 10-15 mm; corolla standard with apex rounded. 124 O. lehmannii

+ Peduncle 1.8-15 cm, not more than 2 × as long as leaves; legume 5-8 mm; corolla standard with apex emarginate or emarginate to rounded (6)

6 (5) Peduncle 1.8-3.5 cm, less than 2 × as long as leaves; leaves 0.5-3 cm. 125 O. savellanica

+ Peduncle 4-15 cm, to 2 × as long as leaves; leaves 2-12 cm. 126 O. proboscidea

Lower Taxa