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

15. Oxytropis sect. Oxytropis

棘豆组 ji dou zu

Oxytropis sect. Protoxytropis Bunge.

Plants acaulescent (but shortly caulescent in Oxytropis mollis), from a simple or branching caudex, with yellowish gray trichomes. Leaves imparipinnate; leaflet blades yellowish gray. Racemes 5-13-flowered or more; peduncle 2-38 cm, somewhat shorter to much longer than leaves. Flowers 0.6-3.5 cm. Legume sessile, subsessile, or with a 2-3 mm stipe; body cylindric to obovoid, 0.8-3 cm.

About 28 species: China, India, Kashmir, Kazakhstan, Kyrgyzstan, Nepal, Pakistan, Russia, Tajikistan, Turkmenistan, Uzbekistan; Europe; nine species (seven endemic) in China.

1 Corolla standard 0.6-0.8 cm; calyx 5-6 mm. 113 O. qilianshanica

+ Corolla standard (0.9-)1-3 cm; calyx 6.3-14 mm (2)

2 (1) Corolla standard (1.4-)2-3 cm (3)

+ Corolla standard (0.9-)1-2.1 cm (5)

3 (2) Peduncle stiffly erect, arising from castaneous to dark brown caudex. 112 O. grandiflora

+ Peduncle typically curved-ascending, arising from a pale brown caudex (4)

4 (3) Leaves (13 or)15-23-foliolate; corolla standard 2.1-2.9 cm and apex rounded, keel beak 1-1.5 mm. 110 O. latibracteata

+ Leaves 19-35-foliolate; corolla standard 1.4-2 cm and apex emarginate, keel beak 1-2.5 mm. 111 O. barkolensis

5 (2) Calyx 6-7 mm; corolla standard ca. 1 cm, keel beak 0.5-1 mm. 118 O. qingnanensis

+ Calyx (6-)8-12 mm; corolla standard (0.9-)1-2.1 cm, keel beak (0.8-)1-4 mm (6)

6 (5) Beak of corolla keel 3-4 mm. 114 O. pseudocoerulea

+ Beak of corolla keel 0.8-1.5 mm (7)

7 (6) Leaves 3-4 cm, 9- or 11-foliolate. 117 O. reniformis

+ Leaves 10-35 cm, 21-41-foliolate (8)

8 (7) Leaflet blades oblong-ovate to lanceolate; peduncle erect; legume erect-ascending; corolla standard apex emarginate. 115 O. songarica

+ Leaflet blades oblong, lanceolate, elliptic, obovate, or oblong-lanceolate; peduncle erect-ascending; legume declining; corolla standard apex rounded. 116 O. mollis

Lower Taxa