Phaseolus maculatus Scheele (1848:465) [clade B;sect. Coriacei Freytag].

TYPE: F Lindheimer 263 (NEOTYPE: MO-1731163; ISONEOTYPES: BM, BRIT, CAN n.v., FI (in Herbarium Webbianum, no. 51931), G, GH-274635, K, MO-1731164, NA, NY, OXF, PH, TCD, UC-248307) .

In the large series of “Flora Texana exsiccata.367.Fasc.III” (Gillett & Shchepanek 1977), the specimen with more information (i.e., “Cibolo, 15 miles west of New Braunfels, Texas.”) is the one out of three kept at Missouri Botanical Garden, and A. Delgado-Salinas (1985) was right in selecting it as neotype, since according to his interpretation the holotype was lost in Berlin during WWII.This sprawling legume component of the grasslands of the Chihuahuan Desert from Texas down to Puebla (Gentry 1957) at 1500–2800 m has often been confused with P.ritensis, a closely related species of the same section; apart from the seedlings (Fig. 11) the differences between them have reported elsewhere (Buhrow 1983; Delgado-Salinas 1985; Freytag & Debouck 2002).

Specimens: U.S.A. Arizona: LA McGill 5683 (ASU-187971). New Mexico: JT Columbus 432 (NMCR). Texas: P Manning 4082 (K). MEXICO. Chihuahua: HS Gentry 8252 (RSA-411984). Coahuila: DH Riskind 2099 (ANSM-51545). Sonora: EA Mearns 1637 (DS-35348). Durango: S González 3195 (IEB-145721). Zacatecas: DG Debouck 346 (K-1041740). San Luís Potosí: JG Schaffner 252 (PH). Aguascalientes: JN Rose 6197 (US-396010). Guanajuato: MC Johnston 2625 B (TEX-273258). Jalisco: R Ramírez-Delgadillo 1285 (IBUG-99837). Queretaro: R Hernández-Magaña 12035 (IEB-173103). Hidalgo: JN Rose 8318 (US-451812). Tlaxcala: H Vibrans 2267 (TEX-273253). Puebla: A Delgado-Salinas 1400 (TEX-273252).