| Sphinctospermum | |
|---|---|
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Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Fabales |
| Family: | Fabaceae |
| Subfamily: | Faboideae |
| Tribe: | Robinieae |
| Genus: | Sphinctospermum Rose (1906) |
| Species: | S. constrictum
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| Binomial name | |
| Sphinctospermum constrictum | |
| Synonyms[2] | |
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Sphinctospermum is a genus of flowering plants in the legume family, Fabaceae. It belongs to the subfamily Faboideae. It is a monotypic genus, containing the single species Sphinctospermum constrictum. It is native to North America, where it occurs in western and central Mexico and in Arizona in the southwestern United States.[2][1][3] The plant is known by the common name hourglass peaseed.[4]
This species occurs in grasslands and dry forests. It grows in sandy soils and is more common in wet years.[1]
- ^ a b c Sphinctospermum constrictum. NatureServe Explorer.
- ^ a b Sphinctospermum constrictum (S.Watson) Rose. Plants of the World Online. Retrieved 20 September 2023.
- ^ Lavin M. & J. J. Doyle. 1991. Tribal relationships of Sphinctospermum (Leguminosae): Integration of traditional and chloroplast DNA data. Systematic Botany Vol. 16, No. 1 pp. 162–172.
- ^ Sphinctospermum constrictum. USDA NRCS Plants Database.