Sphinctospermum
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.[1][2][3] The plant is known by the common name hourglass peaseed.[4]
| Sphinctospermum | |
|---|---|
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| Scientific classification  | |
| Kingdom: | Plantae | 
| Clade: | Tracheophytes | 
| Clade: | Angiosperms | 
| Clade: | Eudicots | 
| Clade: | Rosids | 
| Order: | Fabales | 
| Family: | Fabaceae | 
| Subfamily: | Faboideae | 
| Genus: | Sphinctospermum Rose (1906)  | 
| Species: | S. constrictum  | 
| Binomial name | |
| Sphinctospermum constrictum (S.Watson) Rose (1906)  | |
| Synonyms[1] | |
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This species occurs in grasslands and dry forests. It grows in sandy soils and is more common in wet years.[2]
References
    
- Sphinctospermum constrictum (S.Watson) Rose. Plants of the World Online. Retrieved 20 September 2023.
 - Sphinctospermum constrictum. NatureServe Explorer.
 - 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.
 
External links
    
- Sphictospermum. The Plant List.
 
Further reading
    
Lavin, M. 1990. The genus Sphinctospermum (Leguminosae): Taxonomy and tribal relationships as inferred from a cladistic analysis of traditional data. Systematic Botany Vol. 15, No. 4 pp. 544-559
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