41.2. Astragalus hidalgensis (Rydb.) Barneby var. protensus Barneby, Mem. New York Bot. Grad. 13(1): 176. 1964

Type:— MEXICO, Hidalgo, Jacala, mountain ravine, 4500 ft., 26 June 1939, V H. Chase 7160 (holotype: NY 00005801!; isotype: ARIZ 1cc8ba35-b837-49c1-b699-03d2d84fbb 44, GH00059419 digital image!, MICH 1107111 digital image!) .

Distribution:— Endemic to south of Mexico. Locally distributed in Hidalgo and adjacent areas of Querétaro and Guanajuato (Fig. 11).

Habitat:— Canyons, rhyolitic, stony and limestone soils, humid slopes; pine-oak forest, pine forests; oak forest; adjacent to corn crops; 1350–2500 m.

Examined specimens:—GUANAJUATO: 18 April 1990, Los Finitos, Mpio. Carricillo, E. Ventura 7894, E. López (IEB) ; 2 October 1990, Cerro Pichardo, E. Ventura V. 8855, E. López P. (IEB, MEXU) . HIDALGO. 31 October 1964, Above Jacala, H. D. Ripley 13607, R. C. Barneby (MEXU, NY); 6 November 1979, 20 kms. al Noroeste de Zimapan, R. Hernández M. 3859 (CAS, ENCB, MEXU) ; 6 September 1979, 2 km. al NE. de Trancas y 13 km. al NE. de Zimapan, rumbo a Jacala, A. Delgado S. 1117, J. García y R. Hernández (CAS, ENCB, MEXU) ; 28 June 1964, Alrededores de Jacala, Mpio. De Jacala, L. González Quintero 982 (CAS, ENCB) ; 31 October 1964, HidalgoIn gravelly humus on rock ledges in shade of juniperssteep cool north slopes of barranca above Jacala, H. D. Ripley 13607, R. C. Barneby (CAS, US) ; 26 June 1939, Mountain ravine. Alt. 4500 ft., V. H. Chase 7160 (NY) ; 28 October 1965, 20 km al NE of Zimapan, L. González Q. 3295 (CAS, ENCB, MEXU, NY) ; 25 March 1992, Verdosas, Mpio. Zimapán, V. M. Huerta B. 1456 (IEB) ; 9 July 1992, Entre la Ventolera y Verdosas, V. M. Huerta B. 1681 (IEB) ; 11 February1982, Brecha Trancas-Nicolás Flores, a 16 km al NE de Tranchas (Cerro Prieto), P. Tenorio L. 25, R. Hernández (MEXU) . QUERÉTARO. 1 December 2000, El Derramadero, Mpio. Tolimán, R. Hernández M. 11915 (IEB) ; 24 November 1989, Piedra del Habra ± 2 km, al NW del barrio de Buenavista Tilaco, E. González P. 1280 (IEB, MEXU) .