Sphinctospermum

Sphinctospermum

Apparently Secure  (NatureServe)[1]
Scientific classification Edit this classification
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
Binomial name
Sphinctospermum constrictum
(S.Watson) Rose (1906)
Synonyms[2]
  • Cracca constricta (S.Watson) Tidestr. (1935)
  • Tephrosia constricta S.Watson (1889)

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]

  1. ^ a b c Sphinctospermum constrictum. NatureServe Explorer.
  2. ^ a b Sphinctospermum constrictum (S.Watson) Rose. Plants of the World Online. Retrieved 20 September 2023.
  3. ^ 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.
  4. ^ Sphinctospermum constrictum. USDA NRCS Plants Database.