Phaseolus parvulus Greene, 2021

Phaseolus parvulus Greene (1881:217) View in CoL [clade A; sect. Minkelersia (Martens & Galeotti) Maréchal, Mascherpa, & Stainier ]. TYPE: EL Greene s.n. (LECTOTYPE: NDG-27852; ISOLECTOTYPES: F-133379, G, K, MO-1731190 ,NA-27001, NY) .

Edward Lee Greene presented the descriptions of “New plants of New Mexico and Arizona” based on specimens kept in his herbarium. For Phaseolus parvulus no specimen is mentioned, and there is no illustration in the paper. However, in the Greene Herbariun currently kept at the university of Notre Dame in Indiana, there is a specimen with three small plants stamped “Herbarium Greeneanum 32412” and labelled Phaseolus parvulus Greene n.sp. (handwritten by EL Greene?), that the author considers as the nomenclatural type. Because the original population had many plants (not uncommon in rainy years, from author’s field experience in 1978) from the same gathering Greene was able to distribute duplicates to several Herbaria. A small plant (up to 30–40 cm) from an almost spherical tuberous root (diam. 10–20 mm) of the section Minkelersia growing in altitude (1900–2900 m) pine-oak forests from New Mexico down the Sierra Madre Occidental as far south as the states of Jalisco and México!

Specimens: U.S.A. Arizona: D Atwood 17171 (NY). New Mexico: EH Roalson 1111 (NMCR). MEXICO. Sonora: AL Reina G. 99-546 (NMC-71768). Chihuahua: A Bénitez 2066 (ANSM-59059). Durango: S Acevedo 296 (IEB-79531). Zacatecas: JN Rose 2723 (US-301650). Sinaloa: AC Sanders 21202 (UCR-168974). Nayarit: JN Rose 3425 (US-302402). Jalisco: Luquín 160 (IBUG-32344). México: GB Hinton 4708 (GH).