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

Apparently Secure  (NatureServe)
Scientific classification Edit this 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]
  • Cracca constricta (S.Watson) Tidestr. (1935)
  • Tephrosia constricta S.Watson (1889)

This species occurs in grasslands and dry forests. It grows in sandy soils and is more common in wet years.[2]

References

  1. Sphinctospermum constrictum (S.Watson) Rose. Plants of the World Online. Retrieved 20 September 2023.
  2. Sphinctospermum constrictum. NatureServe Explorer.
  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.

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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