Grimolobium is a genus of flowering plants in the family Fabaceae. It includes eight species native to South America.Ashley N Egan, Abubakar Bello, Charles H Stirton, Samson B M Chimphango, A Muthama Muasya, Comprehensive phylogenetic analysis of tribe Psoraleeae (Fabaceae) supports segregation of the South American Otholobium as a New Genus Grimolobium, Botanical Journal of the Linnean Society, 2024;, boae083, https://doi.org/10.1093/botlinnean/boae083
Species in the genus were formerly placed in genus Otholobium, which included both South American and African species. A phylogenetic analysis published in 2024 found that the South American species formed a distinct clade, and the new genus Grimolobium was described to include them. The genus is named in honor of James Grimes, a botanist who did distinguished work on New World species in tribe Psoraleeae.
Species Eight species are accepted. Grimolobium brachystachyum Grimolobium diffidens Grimolobium glandulosum Grimolobium higuerilla Grimolobium holosericeum Grimolobium mexicanum Grimolobium munyense Grimolobium pubescens
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