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Orbexilum
Orbexilum pedunculatum
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Rosids
Order:	Fabales
Family:	Fabaceae
Subfamily:	Faboideae
Tribe:	Psoraleeae
Genus:	Orbexilum Raf. (1832)
Species
See text
Synonyms
Rhytidomene Rydb. (1919)

Orbexilum, commonly called leather-root, is a genus of flowering plants in the legume family (Fabaceae). They are native to North America, where they are found in the United States and Mexico, south to Chiapas.

This genus can be distinguished from other genera in the Psoraleeae by its "thick glabrous pod walls that are distinctively rugose and by calyx that is scarcely accrescent."

Taxonomy

The genus was described by Constantine Samuel Rafinesque in 1832, with the type species O. latifolia, moved from Psoralea. (O. latifolia is now considered a synonym of O. onobrychis.) Rafinesque differentiated Orbexilum from Psoralea largely on the basis of features of the calyx.

Species

Orbexilum comprises the following species:

• Orbexilum chiapasanum B.L.Turner
• Orbexilum lupinellus (Michx.) Isely
• †Orbexilum macrophyllum (Rowlee) Rydb. – bigleaf scurfpea
• Orbexilum melanocarpum (Benth.) Rydb.
• Orbexilum oliganthum (Brandegee) B.L.Turner
• Orbexilum onobrychis (Nutt.) Rydb.
• Orbexilum pedunculatum (Mill.) Rydb.
• Orbexilum psoralioides (Walter) Vincent, syn. Orbexilum gracile (Torr. & A.Gray) B.L.Turner
• Orbexilum simplex (Nutt. ex Torr. & A.Gray) Rydb.
• †Orbexilum stipulatum (Torr. & A.Gray) Rydb.
• Orbexilum virgatum (Nutt.) Rydb.

Notes

1. The specific epithet is sometimes incorrectly spelled lupinellum, but is a noun in apposition, so is correctly spelled lupinellus.

References

1. ^ "Orbexilum Raf.". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 2021-06-14.
2. NRCS. "Orbexilum". PLANTS Database. United States Department of Agriculture (USDA). Retrieved 25 July 2015.
3. Alan Weakley (2015). "Flora of the Southern and Mid-Atlantic States".
4. ^ Turner BL. (2008). "Revision of the genus Orbexilum (Fabaceae: Psoraleeae)" (PDF). Lundellia. 11: 1–7. doi:10.25224/1097-993X-1.11.1.
5. "Orbexilum". International Plant Names Index (IPNI). Royal Botanic Gardens, Kew; Harvard University Herbaria & Libraries; Australian National Botanic Gardens. Retrieved 2021-06-14.
6. "Orbexilum latifolia". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 11 September 2023.
7. Rafinesque, C.S. (1832). "107. Twenty new genera of plants from the Oregon mountains, etc". Atlantic Journal, and Friend of Knowledge. 1 (3): 144–146. Retrieved 2021-06-14.
8. LeGrand, H; Sorrie, B (2021). "Account for Bigleaf Scurfpea". Vascular Plants of North Carolina. North Carolina Biodiversity Project and North Carolina State Parks. Retrieved May 26, 2021.
9. "Orbexilum lupinellus". International Plant Names Index (IPNI). Royal Botanic Gardens, Kew; Harvard University Herbaria & Libraries; Australian National Botanic Gardens. Retrieved 2021-06-14.

External links

• USDA Plants Profile
• Media related to Orbexilum at Wikimedia Commons
• Data related to Orbexilum at Wikispecies

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