Phaseolus plagiocylix Harms (1921: 508)

Debouck, D. G., 2021, Phaseolus Beans (Leguminosae: Phaseoleae): A Checklist And Notes On Their Taxonomy And Ecology, Journal of the Botanical Research Institute of Texas 15 (1), pp. 73-111 : 95

Phaseolus plagiocylix Harms (1921: 508) [clade A; sect. Minkelersia (Martens & Galeotti) Maréchal, Mascherpa, & Stainier ].

TYPE: E Seler 1042 ( HOLOTYPE: B n.v. ; ISOTYPE: GH-64098 ).

The type was probably lost at Berlin during WWII, and in the original publication (p. 508) there is no mention about isotypes. There is however a specimen labelled “Ex Museo botanico Berolinensi” kept in the Gray Herbarium ( GH-64098 ) and annotated by Hermann Harms “1042 Phaseolus plagiocylix Harms n.sp. ” that can be considered as the nomenclatural type. Known by few collections from Nuevo León, it has been reported from southern Coahuila (Carranza-P. & Villareal-Quintanilla 1997), but no specimens are indicated (nor seen by the author during his visit at ANSM in 2011). Some authors ( Acosta-DÍaz et al. 2019) consider it as extinct.