Orbexilum

Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Cladus: Rosids
Cladus: Eurosids I
Ordo: Fabales

Familia: Fabaceae
Subfamilia: Faboideae
Tribus: Psoraleeae
Genus: Orbexilum
Species: O. chiapasanum – O. lupinellum – O. macrophyllum – O. melanocarpum – O. oliganthum – O. onobrychis – O. pedunculatum – O. psoralioides – O. simplex – O. stipulatum – O. virgatum
Source(s) of checklist:

Govaerts, R. et al. 2021. Orbexilum in Kew Science Plants of the World online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the internet. Accessed: 2021 May 27. Reference page.

Name

Orbexilum Raf.

Type species: Psoralea latifolia Torr.

Synonyms

Rhytidomene Rydb., N. Am. Fl. 24: 12 (1919)

Distribution
Native distribution areas:
References
Primary references

Rafinesque-Schmaltz, C.S. 1832–1833. Atlantic Journal, and Friend of Knowledge. Philadelphia. BHL Reference page. : 1: 145

Links

Govaerts, R. et al. 2021. Orbexilum in Kew Science Plants of the World online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the internet. Accessed: 2021 May 27. Reference page.
International Plant Names Index. 2021. Orbexilum. Published online. Accessed: May 27 2021.
Tropicos.org 2021. Orbexilum. Missouri Botanical Garden. Published on the internet. Accessed: 2021 May 27.
Hassler, M. 2021. Orbexilum. World Plants: Synonymic Checklists of the Vascular Plants of the World In: Roskovh, Y., Abucay, L., Orrell, T., Nicolson, D., Bailly, N., Kirk, P., Bourgoin, T., DeWalt, R.E., Decock, W., De Wever, A., Nieukerken, E. van, Zarucchi, J. & Penev, L., eds. 2021. Species 2000 & ITIS Catalogue of Life. Published on the internet. Accessed: 2021 May 27. Reference page.
Hassler, M. 2021. World Plants. Synonymic Checklist and Distribution of the World Flora. . Orbexilum. Accessed: 27 May 2021.

Vernacular names
English: leather-root

Orbexilum, commonly called leather-root,[2] 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.[3]

This genus can be distinguished from other genera in the Psoraleeae by its "thick glabrous pod walls that are distinctively rugose and by [a] calyx that is scarcely accrescent."[4]

Taxonomy

The genus was described by Constantine Samuel Rafinesque in 1832, with the type species O. latifolia, moved from Psoralea.[5] (O. latifolia is now considered a synonym of O. onobrychis.[6]) Rafinesque differentiated Orbexilum from Psoralea largely on the basis of features of the calyx.[7]
Species

Orbexilum comprises the following species:[1][4]

Orbexilum chiapasanum B.L.Turner
Orbexilum lupinellus (Michx.) Isely[note 1]
†Orbexilum macrophyllum (Rowlee) Rydb. – bigleaf scurfpea[8]
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

The specific epithet is sometimes incorrectly spelled lupinellum, but is a noun in apposition, so is correctly spelled lupinellus.[9]

References

"Orbexilum Raf.". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 2021-06-14.
"Orbexilum". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 25 July 2015.
Alan Weakley (2015). "Flora of the Southern and Mid-Atlantic States".
Turner BL. (2008). "Revision of the genus Orbexilum (Fabaceae: Psoraleeae)" (PDF). Lundellia. 11: 1–7.
"Orbexilum". International Plant Names Index (IPNI). Royal Botanic Gardens, Kew. Retrieved 2021-06-14.
"Orbexilum latifolia". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 2021-06-14.
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.
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.
"Orbexilum lupinellus". International Plant Names Index (IPNI). Royal Botanic Gardens, Kew. Retrieved 2021-06-14.