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

7. Oxytropis sect. Mesogaea Bunge, Mém. Acad. Imp. Sci. Saint Pétersbourg, sér. 7. 22(1): 38. 1874.

长茎棘豆组 chang jing ji dou zu

Herbs, caulescent (but acaulescent in some Oxytropis maqinensis), with (1 or)2-6 conspicuous internodes, non-glandular (except O. tudanensis). Leaves with leaflets not verticillate. Racemes 6- to many flowered; peduncle 1.5-25 cm or longer, shorter to longer than leaves. Corolla standard broadly ovate, not contracted in middle, not widened at basal half, and without auricles. Legume shortly stipitate or stipitate; body cylindric, narrowly ellipsoid, ovoid, or obovoid.

Thirty-two species: Afghanistan, Bhutan, China, India, Iran, Kazakhstan, Kyrgyzstan, Russia, Tajikistan, Turkmenistan, Uzbekistan; 32 species (18 endemic) in China.

1 Corolla yellow, pale yellowish, white, or rarely red (2)

+ Corolla blue, purple, bluish purple, pale purple, or violet (9)

2 (1) Corolla white, keel beak (0.5-)2.5-3 mm; bracts 5-10 mm. 28 O. nutans

+ Corolla yellow, pale yellowish, or rarely red, keel beak 0.2-1 mm; bracts 1.5-7(-8) mm (3)

3 (2) Corolla standard 6-7 mm; calyx ca. 4 mm; bracts ca. 1.5 mm. 40 O. sinkiangensis

+ Corolla standard 8-17 mm; calyx 5.8-11.4 mm; bracts 2-8 mm (4)

4 (3) Bracts ca. 2 mm; corolla standard 0.8-0.9 cm, keel ca. 6.7 mm; legume stipe ca. 7 mm. 44 O. gueldenstaedtioides

+ Bracts 4-8 mm; corolla standard 0.9-1.7 cm, keel 7-14 mm; legume stipe to 2 mm (5)

5 (4) Calyx 7-10 mm, lobes 3.5-4.5 mm (6)

+ Calyx 5.8-11.5 mm, lobes 2-8 mm (7)

6 (5) Leaves 11-15-foliolate; peduncle 10-35 cm; legume body 2-3 × 0.5-0.6 cm. 42 O. meinshausenii

+ Leaves 15-29-foliolate; peduncle 3-12 cm; legume body 1.5-2 × 1-1.5 cm. 43 O. pilosa

7 (5) Leaflet blades 2.5-3 cm; calyx 5.8-7.2(-8.5) mm. 41 O. ochrocephala

+ Leaflet blades 0.5-2(-3) cm; calyx 6.5-11.5 mm (8)

8 (7) Legume body (1-)1.5-2.5 cm; bracts ca. 4 mm. 45 O. ochroleuca

+ Legume body 0.8-1.2 cm; bracts 6-7 mm. 46 O. kansuensis

9 (1) Plants with impressed yellow glands; leaflets at least moderately spaced; racemes 2-6-flowered; beak of corolla keel 0.4-0.7 mm. 26 O. tudanensis (O. sect. Falcicarpae)

+ Plants non-glandular; leaflets variously arranged; racemes variously flowered; beak of corolla keel various (10)

10 (9) Plants (3-)4-10(-12) cm tall (11)

+ Plants (3-)10-80(-100) cm tall (17)

11 (10) Leaves (0.5-)1-3 cm, 9-15-foliolate; leaflet blades (1-)2-5 mm. 30 O. tianschanica

+ Leaves 2-8 cm, 15-25(-29)-foliolate; leaflet blades 3-10(-12) mm (12)

12 (11) Racemes many flowered; corolla standard 5-9(-14) mm (13)

+ Racemes (4-)6-8(or 9)-flowered; corolla standard (9-)11-13(-15) mm (15)

13 (12) Leaves 5-20 cm; leaflet blades 5-25 × 2-9 mm; peduncle 7-25 cm or more. 32 O. deflexa

+ Leaves 2-5(-8) cm; leaflet blades 3-10(-12) × 1.5-5 mm; peduncle 1.4-6(-8) cm (14)

14 (13) Calyx 4-5 mm; corolla standard 5-9 mm, keel beak ca. 0.3 mm. 34 O. hirsutiuscula

+ Calyx 5-7 mm; corolla standard 9-14 mm, keel beak 1.5-2 mm. 49 O. dichroantha

15 (12) Plants 8-12 cm tall; leaves (17 or)19- or 21-foliolate; peduncle 7-11 cm; calyx ca. 4 mm. 38 O. chinglingensis

+ Plants 3-7 cm tall; leaves 9-19-foliolate; peduncle 2-9 cm; calyx 5-9 mm (16)

16 (15) Leaves 11-19-foliolate; leaflet blades 7-15 mm; racemes 7-9-flowered; corolla standard 1.2-1.3(-1.5) cm. 48 O. hirsuta

+ Leaves 9- or 11-foliolate; leaflet blades 2.5-6 mm; racemes 2-5-flowered; corolla standard 0.9-1.1 cm. 56 O. latialata

17 (10) Leaves 21-foliolate or more on at least some leaves (only to 23-foliolate in O. maqinensis and O. xinglongshanica) (18)

+ Leaves 9-21-foliolate (rarely 25-foliolate in O. podoloba and O. zekogensis) (28)

18 (17) Corolla standard 1-1.2 cm, keel beak 0.2-0.5 mm; legume stipe 1.5-2 mm, body 1.2-1.6 cm. 47 O. qinghaiensis

+ Corolla standard (0.5-)0.7-1.6 cm; keel beak, legume stipe, and legume body not simultaneously within same range as above (19)

19 (18) Calyx 7.5-11(-11.2) mm; corolla standard 1.5-1.6 cm. 52 O. maqinensis

+ Calyx (2.2-)4-8(-10) mm; corolla standard (0.5-)0.7-1.5 cm (20)

20 (19) Racemes 3-10(-15)-flowered (21)

+ Racemes many flowered (22)

21 (20) Calyx lobes 1.5-2 mm; corolla standard (0.5-)0.7-0.8(-1) cm; legume 3-5 mm in diam 50 O. glabra

+ Calyx lobes 2.5-4.7 mm; corolla standard (1-)1.1-1.4 cm; legume 7-12 mm in diam 58 O. melanocalyx

22 (20) Corolla wings (5-)6-7 mm, keel beak 0.2-0.5 mm. 50 O. glabra

+ Corolla wings 8-14 mm, keel beak 0.5-2.5 mm (23)

23 (22) Leaves 5-6 cm; peduncle ca. 6 cm. 55 O. densiflora

+ Leaves (3-)5-20 cm; peduncle mainly over 6 cm (24)

24 (23) Corolla standard 0.8-1.2 cm, keel 0.7-0.9 cm; calyx (3-)5-7(-8) mm (25)

+ Corolla standard 1-1.5 cm, keel (0.9-)1-1.3 cm; calyx (7-)8(-10) mm (26)

25 (24) Corolla standard 0.8-0.9 cm, keel 8-9 mm; leaflets pilose or adaxially glabrous. 32 O. deflexa

+ Corolla standard 0.8-1.2 cm, keel 7-8 mm; leaflets with trichomes. 57 O. lapponica

26 (24) Leaflet blades 14-20 mm; beak of corolla keel 1.5-1.7 mm. 54 O. xinglongshanica

+ Leaflet blades 3-14 mm; beak of corolla keel 1-1.5 mm (27)

27 (26) Stipules 10-12 mm; legume 10-15 × 3-4 mm. 29 O. penduliflora

+ Stipules 6-8 mm; legume (17-)20-25 × (7-)8-10 mm. 53 O. giraldii

28 (17) Plants 3-4 cm tall; leaves 9- or 11-foliolate. 56 O. latialata

+ Plants (3-)5-80(-100) cm tall; leaves (7-)11-21(-29)-foliolate (29)

29 (28) Plants 3-13 cm tall; racemes 6-9-flowered (30)

+ Plants (5-)10-80(-100) cm tall; racemes 3-9-flowered or more (31)

30 (29) Leaves 1.5-4 cm; leaflet blades 4-7 mm; corolla standard 0.9-1 cm, keel beak short; legume body 1-1.2 cm. 31 O. gerzeensis

+ Leaves 5-9 cm; leaflet blades 7-15 mm; corolla standard 1.2-1.3 cm, keel beak 2.5-3 mm; legume body 1.5-2 cm. 48 O. hirsuta

31 (29) Racemes 3-12-flowered (32)

+ Racemes 8- to many flowered (34)

32 (31) Racemes 3-5-flowered, dense or compact. 39 O. sitaipaiensis

+ Racemes 3-12-flowered, rather lax (33)

33 (32) Corolla keel 1-1.4 cm; stipules ca. 3 mm; bracts ca. 1.5 mm. 36 O. taochensis

+ Corolla keel ca. 0.8 cm; stipules 5-7 mm; bracts 3-6 mm. 37 O. zekogensis

34 (31) Leaflet blades 1.4-2 cm; corolla standard 1.1-1.5 cm, wings 1.1-1.4 cm. 54 O. xinglongshanica

+ Leaflet blades (0.4-)0.5-1.4 cm (but to 2.5 cm in O. glabra); corolla standard (0.5-)0.6-1 cm, wings 0.5-1 cm (35)

35 (34) Calyx 6-8 mm, lobes 3-4 mm. 59 O. subpodoloba

+ Calyx (2.2-)4-5 mm, lobes 1.2-2.5 mm (36)

36 (35) Leaves 2-4 cm; peduncle 1.5-3 cm; corolla wings ca. 5.5 mm. 35 O. ganningensis

+ Leaves (3-)5-15 cm; peduncle (2-)4.5-20 cm; corolla wings (5-)6-10 mm (37)

37 (36) Calyx lobes 2.4-2.5 mm; corolla wings ca. 10 mm; leaflet blades oblong. 51 O. podoloba

+ Calyx lobes 1.2-2 mm; corolla wings (5-)6-8 mm; leaflet blades linear, lanceolate, ovate-lanceolate, narrowly ovate, or elliptic (38)

38 (37) Leaflet blades ca. 1 mm wide; racemes (1-)4-7 cm; beak of corolla keel ca. 1.5 mm. 33 O. yekenensis

+ Leaflet blades (1-)3-7 mm wide; racemes 4-7 cm; beak of corolla keel 0.2-0.5 mm. 50 O. glabra

List of lower taxa