Purple locoweed Oxytropis lambertii, copyright Matt Lavin.

Belongs within: Astragaleae.

Oxytropis is a genus of hairy perennials found in Eurasia and North America (Hickman 1993).

Characters (from Hickman 1993): Perennial, unarmed, hairy. Leaves odd-1-pinnate, basal, sometimes also cauline; stipules gen partly fused to petiole, initially forming a sheath, or free. Inflorescence a raceme, generally scapose, spike- or head-like, or one- to two-flowered; bracts generally persistent. Flower with calyx lobes shorter than tube, corolla pink-purple, white, or yellowish, keel tip beaked; 9 filaments fused, 1 free; style glabrous. Fruit ascending or reflexed, generally persistent, lanceolate or inflated, more or less 2-chambered, septum arising from upper suture, more or less incomplete.

    |--O. arenae-ripariae O88
    |--O. borealis H93
    |    |--O. b. var. borealis H93
    |    `--O. b. var. viscida H93
    |--O. cyanea C55
    |--O. deflexa CL86
    |    |--O. d. var. deflexa H93
    |    `--O. d. var. sericea H93
    |--O. duthieana O88
    |--O. fasciculiflorum O88
    |--O. foetida C55
    |--O. graminetorum O88
    |--O. humifusa O88
    |--O. hypoglottoides (Baker) Ali 1973 [=Astragalus hypoglottoides Baker in Hooker 1876] CS05
    |--O. kansuensis O88
    |--O. lambertii CP13
    |--O. lapponica CS05
    |--O. microphylla O88
    |--O. morenarum O88
    |--O. nepalensis O88
    |--O. oreophila H93
    |--O. parryi H93
    |--O. torrentium O88
    |--O. uralensis C55
    `--O. williamsii O88

*Type species of generic name indicated


[C55] Candolle, A. de. 1855. Géographie Botanique Raisonée: Ou exposition des faits principaux et des lois concernant la distribution géographique des plantes de l’époque actuelle vol. 1. Librairie de Victor Masson: Paris.

[CP13] Cardoso, D., R. T. Pennington, L. P. de Queiroz, J. S. Boatwright, B.-E. Van Wyk, M. F. Wojciechowski & M. Lavin. 2013. Reconstructing the deep-branching relationships of the papilionoid legumes. South African Journal of Botany 89: 58–75.

[CS05] Chauhan, A., D. K. Singh, S. K. Srivastava & S. K. Murti. 2005. Oxytropis hypoglottoides (Baker) Ali: a new record for India. Bulletin of the Botanical Survey of India 47: 185–188.

[CL86] Collins, E. I., & R. W. Lichvar. 1986. Vegetation inventory of current and historic black-footed ferret habitat in Wyoming. Great Basin Naturalist Memoirs 8: 85–93.

[H93] Hickman, J. C. (ed.) 1993. The Jepson Manual: Higher Plants of California. University of California Press: Berkeley (California).

[O88] Ohba, H. 1988. The alpine flora of the Nepal Himalayas: an introductory note. In: Ohba, H., & S. B. Malla (eds) The Himalayan Plants vol. 1. The University Museum, University of Tokyo, Bulletin 31: 19–46.

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