Phaseolus glabellus Piper (1926: 683)

Phaseolus glabellus Piper (1926: 683) View in CoL [clade A; not assigned to a sect.]. TYPE: CJW Schiede 229 (LECTOTYPE: HAL-54634; ISOLECTOTYPES: G,P-36703).

This taxon was published in 1926 as a new name within “ Phaseolus coccineus and its allies”.Charles Vancouver Piper faced the situation of two names: Phaseolus glaber Schlecht. and Phaseolus glaber Roxb. , but on two different biological entities within the same genus! The former name was published in Linnaea (1838: 327) on two bean plants (n. 649 et n. 651) collected “in dumetis Jalapae et pr. S. Andres” by Christian Julius Wilhelm Schiede. The latter name was published in Flora Indica (1832: 291) on a legume from Mauritius (now Vigna glabrescens Maréchal, Mascherpa & Stainier, 1978a, p. 212 ). The way out for Piper studying bean plants from the same region of Mexico was to rename the taxon. Because the plant is almost glabrous, but with the minute uncinate hairs namely at the nodes, a logical choice for the name was glabellus (a shorter synonym of glabriusculus, itself a diminutive of glaber or glabrous).

Piper (1926, p. 683) indicated that the type is in Paris, while Delgado-Salinas (1985, p. 207) indicated it is in Halle. When comparing the labels and handwritten notes on the herbarium sheets, it seems clear that the materials in G and P are specimens sent from elsewhere (Halle?). In HAL there are three specimens collected by C.J.W. Schiede. Bearing in mind Article 8.2. of the Code and applying some anteriority rule in the type description of P. glaber by Diederich Franz Leonhard von Schlechtendal (1838, p. 327–328), it seems that the lectotype is HAL-54634 (lectotype because there is none unequivocally indicated in the original publication; Art. 9.2. of the Code). It is a collection made in August 1828 near Jalapa (with number 229 becoming 649 in the herbarium, the latter being mentioned in the original publication), while specimen HAL-54633 is of May 1829 also “in dumetis Jalapae”. The third specimen HAL-54632 is collection 229 (too!but becoming 651 in the original publication) by C.J.W. Schiede made near (= prope) San Andres in August 1828, a syntype.

It is a taxon mimicking P. coccineus (note in Fig. 6 View FIG the hooded standard and shorter wings, brick red or dark orange rather than true scarlet) but quite isolated in the genus ( Delgado-Salinas et al. 2006), with an intermediate distribution around the Gulf of Mexico in alder, oak, sweet gum montane forest at 700–1800 m ( Schmit et al. 1996).

Specimens: MEXICO. Tamaulipas: S Rodríguez 83 (CICY-21373). San Luís Potosí: DG Debouck 2046 (BR). Hidalgo: L González-Quintero 1570 (ENCB). Queretaro: R Fernández 3115 (ENCB). Puebla: A Delgado-Salinas 1582 (K). Veracruz: E Bourgeau 2919 (G). Oaxaca: M Sousa-Sánchez 8886 (CR-91424). Chiapas: M Linden s.n. (P).