| Family | FABACEAE |
| Genus species | Lathyrus decaphyllus Pursh trib. Vicieae |
| Bibliography | Fl. Amer. Sept. 2: 471 (1813) |
| Native Range | wc. & c. USA to ne. Mexico |
| Primary Biome | Temperate |
| Habitat | steppes |
| Description | glabrous, leaflets 2-5-pairs, elliptic-lanceolate to linear-oblong, rigid, distinctly veined, lanceolate, pedicels 3-5-flowered, flowers large |
| Size | 20-30cm |
| Color | purple |
| Bloom | summer |
| Ca | |
| Type | perennial |
| Cultivation | sunny site with a deep, drained soil alpine house, rich, drained soil, sun |
| Propagation | scarified seed in spring, germ. 1-3 months, 13-18°C cuttings in late summer |
| Synonyms | Lathyrus decaphyllus var. minor Hook. & Arn. Lathyrus hapemanii A.Nelson Lathyrus myrtifolius Spreng. Lathyrus ornatus Torr. & A.Gray Lathyrus ornatus var. flavescens Rydb. Lathyrus polymorphus Nutt. Lathyrus polymorphus var. hapemanii (A.Nelson) C.L.Hitchc. Lathyrus stipulaceus (Pursh) Butters & St.John Orobus polymorphus (Nutt.) Alef. Vicia stipulaceae Pursh |
| Territory | 7 Northern America 73 Northwestern U.S.A. (COL Colorado) 74 North-Central U.S.A. (KAN Kansas, NEB Nebraska, OKL Oklahoma, SDA South Dakota) 76 Southwestern U.S.A. 77 South-Central U.S.A. (TEX Texas) 79 Mexico (MXE Mexico Northeast) |