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Published In: Astragalogia (qto.), 24–28, 66–98, pl. 2–8. 1802. (15 Nov 1802) (Astragalogia) Name publication detailView in BotanicusView in Biodiversity Heritage Library

Project Name Data (Last Modified On 6/2/2011)
Acceptance : Accepted
Project Data     (Last Modified On 6/3/2011)
General/Distribution: About 300 species, distributed in Europe, Asia and N. America; locally represented by 21 species. It is taxonomically a difficult genus; the species are not always clearly definable. On the other hand, lumping of various variants will result in a very heterogeneous assemblage. Experimental work is likely to be useful in understanding the basis of variation.


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Herbs or undershrubs. Leaf imparipinnate, leaflets entire, stipels absent; stipules adnate to the petiole or free. Inflorescence an axillary raceme or spike. Bracts often small. Bracteoles minute or absent. Calyx gamosepalous, teeth sub-equal. Vexillum ovate or oblong. Keel mucronate. Stamens diadelphous, 9+1, vexillary stamen free. Ovary sessile or stipitate, style straight or more often curved, not barbate, stigma terminal. Fruit turgid, the seed bearing suture generally intruded, partly dividing the fruit. Seeds reniform, without strophiole.

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1 Leaf, bracts and calyx glandular (2)
+ Leaf, bracts and calyx eglandular (3)
2 (1) Fruit uniformly hairy, glands almost obscure Oxytropis chiliophylla
+ Fruit glabrous to subglabrous, glands prominent Oxytropis microphylla
3 (1) Fruit membranous, inflated (4)
+ Fruit not as above (6)
4 (3) Fruit c. 12-14 mm wide (in pressed condition), mucro of the keel c. 3 mm long Oxytropis platonychia
+ Fruit c. 10 mm or less wide, mucro of the keel c. 2 mm or less (5)
5 (4) Mucro of the keel more than 1 mm long (up to c. 2 mm) Oxytropis cachemiriana
+ Mucro of the keel than or equal to 1 mm Oxytropis tatarica
6 (3) Aerial stem elongated (7)
+ Aerial stem not elongated (9)
7 (6) Stipules free lateral, inflorescence elongated, not globose Oxytropis glabra
+ Stipules united at the base, leaf opposed, inflorescence globose, at least when young (8)
8 (7) Subtending leaf longer or only slightly shorter than the inflorescence, lateral calyx teeth c. 1.5-2 mm long Oxytropis hypoglottoides
+ Subtending leaf much shorter than the inflorescence, lateral calyx teeth c. 3 mm long Oxytropis lapponica
9 (6) Leaflets verticillate (at least at some points along the rachis) (10)
+ Leaflets not verticillate (12)
10 (9) Calyx teeth shorter than the tube Oxytropis staintoniana
+ Calyx teeth longer than the tube (11)
11 (10) Leaflets 30-40 per leaf, densely hairy Oxytropis chitralensis
+ Leaflets 9-12 per leaf, sparsely hairy Oxytropis birirensis
12 (9) Fruit sessile (13)
+ Fruit stipitate (16)
13 (12) Mucro of the keel c. 2-2.5 mm long (14)
+ Mucro of the keel 1 mm long (15)
14 (13) Calyx c. 15-16 mm long, teeth c. 9 mm long, vexillum c. 13-14 mm long, plant villous, hairs spreading Oxytropis sikaramensis
+ Calyx c. 13 mm long, teeth c. 4 mm long, vexillum c. 21 mm long, plant velvety brownish Oxytropis stracheyana
15 (13) Vexillum c. 7 mm or less, branches not flexuous, woody Oxytropis densa
+ Vexillum c. 9 mm long, branches spreading flexuous Oxytropis savellanica
16 (12) Calyx teeth c. 6-8 mm long Oxytropis gloriosa
+ Calyx teeth up to 5 mm long (17)
17 (16) Calyx c. 4 mm long (teeth c. 2 mm), vexillum c. 6-7 mm long Oxytropis crassiuscula
+ Calyx more than 4 mm long, vexillum 9 mm or more long (18)
18 (17) Calyx teeth equal to calyx cup (mucro of the keel c. 2.5 mm long) Oxytropis luteo-caerulea
+ Calyx teeth smaller the cup (19)
19 (18) Calyx teeth up to 2 mm long, cup c. 3.5-4 mm long (mucro less than 1 mm long) (21)
+ Calyx teeth c. 2.5 mm or more (20)
20 (19) Leaflets 7 mm or less long, mostly c. 2.5 mm or less broad Oxytropis humifusa
+ Leaflets more than 7 mm long and mostly more than 2.5 mm broad Oxytropis mollis
21 (19) Stipules uniformly pubescent outside; petiole up to 4.5 cm; leaflets 4-10 mm long, c. 1-4 mm broad; peduncle c. 2.5-30 cm long Oxytropis immersa var. jinaliensis
+ Stipules whitish papery, glabrous or scantily pubescent; petiole c. 5-12 mm long; leaflets c. 2-6 mm long, less than 1-2 mm broad; peduncle up to 6.5 cm long Oxytropis immersa (Baker ex Aitch.) Bunge ex B. Fedtsch. var. immersa
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