101.2. Astragalus wootonii E. Sheld. var. wootonii

Type: — USA, New Mexico, near Las Cruces, May 1892, E. O. Wooton s.n. (holotype: not found; isotype: Dona Ana County, Organ Mountains, 15 May 1892, Wooton s.n. NY00005779!) .

Phaca wootonii (E. Sheld.) Rydb., N. Amer. Fl. 24(6): 350. 1929. — Astragalus wootonii E. Sheld. var. typicus Barneby, Amer. Midl. Naturalist 41: 498. 1949.

Astragalus playanus M. E. Jones, Contr. W. Bot. 8: 6. 1898. — Astragalus allochrous A. Gray var. playanus (M.E. Jones) Isely, Syst. Bot. 8: 420 (1983).

Astragalus triflorus (DC.) A. Gray. var. playanus M. E. Jones, Rev. N.-Amer. Astragalus 106. 1923. — Astragalus triflorus (DC.) A.Gray, Smithsonian Contr. Knowl. 5(6): 45. 1853 (non A. triflorus (DC.) A. Gray, sens. stric., nec Phaca triflora DC.)).

Phaca trac yi Rydb ., N. Amer. Fl. 24(6): 351. 1929; Astragalus trac yi (Rydb.) Cory, Rhodora 38: 406. 1936.

Distribution:— This variety is distributed mainly in northern Mexico, from central Sonora, in plains and hills from northwestern, eastern and southeastern Chihuahua, northwestern Coahuila to northwestern Durango. An isolated locality is found in southern San Luis Potosí (San Luis Potosí). Also, in California, Arizona, New Mexico, and Texas in USA (Fig. 28).

Habitat:— Alluvial plains; igneous reddish, sandy, gravelly, clayey, soils; creeks with mezquite; acacia and blue grama association; flooded areas with mezquite and sotol; acacia and creosote bush scrubland; desert grasslands associated with acacia and mezquite; scrubland-grassland with mezquite and ocotillo; roadside; 1450–2800 m.

Specimens examined:— AGUASCALIENTES: 20 March 1992, A. Rodríguez A. 255 (IEB). CHIHUAHUA: 24 March 2006, Rancho Mesteñas, Mpio. Camargo, J. A. Encina 1650, J. Encina, B. Gutiérrez B., E. Rocha M. (ANSM); 28 March 2006, Carretera a Ojinaga, entre Rancho la Morita y Ejido Oasis, J. A. Encina 2713, J. C. Díaz, J. A. Guillermo, J. C. Alcaya (ANSM); 27 April 1979, Ejido Flores Magón, Mpio. Buenaventura, F. Ibarra s.n., F. Gómez (ANSM); 26 March 1973, 7 km airline NW. of San Juan de Ulua (now called Primero de Mayo), M. C. Johnston 10423, T. L. Wendt, F. Chiang (CAS, TEX-LL); 31 March 1973, Estacion Microondas “La Colorado”, ca. 38 km. S. of Jimenez on highway to Torreon, M. C. Johnston 10523, T. L. Wendt, F. Chiang (CAS, MEXU, NY, TEXLL); 2 April 1973, ½ km N of Casa Blanca; this is 45 km. N of the Camargo-Jimenez hwy on the La Perla road, M. C. Johnston 10541, T. L. Wendt, F. Chiang (MEXU, NY, TEX-LL); 24 March 1975, 2.2 mi E of Rancho Santa Rita on road to Hacienda Encinillas, W of Sierra Encinillas, T. Wendt 777 A, E. Lott (MEXU, NY, TEX-LL); 4 May 1973, 1.5 km. W of Rancho Sta. Rita on the road to Las Mesteñas, M. C. Johnston 10799, T. L. Wendt, F. Chiang (CAS, MEXU, NY, TEX-LL); 9 May 1959, 3–5 miles south-east of Nueva Casas Grandes, D. S. Correll 21670, I. M. Johnston (NY, TEX-LL); 3 April 1997, J. Spencer 9 (NY, TEX-LL); 30 March 1971, 37 mi S of Ahumada; on Mex. hwy 45, 37 mi S of Ahumada; on Mex. hwy 45, B. J. Cox 3316 (NY, TEX-LL); 15–17 May 1908, Vicinity of Aldama, E. Palmer 246 (NY, US); 6 April 1886, Plains near Chihuahua, C. G. Pringle 892 (CAS, NY, US); 8–27 April 1908, Vicinity of Chihuahua, E. Palmer 43 (NY, US); 5 May 1901, Plains of Moctezuma, C. G. Pringle 9441 (US); 31 March 1973, Estacion Microondas “La Colorado”, ca. 38 km. S. of Jimenez on highway to Torreon, M. C: Johnston et al., 10523 (MEXU); 6 April 1886, Plains near Chihuahua, C. G. Pringle 892 (MEXU); 9 April 1898, Sandy plains near Lake Guzman, C. G. Pringle 7544 (ENCB, MEXU); 20 June 1980, B. Siqueiros 566 (MEXU); 6 May 1959, 12 miles E of Parral, D. S. Correll 21535 (ENCB); 18 March 1975, T. Wendt 687, E. Lot (ENCB); 30 March 1971, W. E. Harmon 5328, Cox (ENCB). DURANGO: 4 April 1970, 8 mi N of El Casco on Hwy 45, Wm. F. Mahler 5718, J.W. Thieret (NY); 25-III/ 16 April 1906, Collected at Tepehuanes, E. Palmer 10 (NY, US); 6 February1985, Entre San Atenogenes y Narciso Mendoza, S. González 3100 (ANSM, ENCB, IBUG, IEB, MEXU); IV-1978, Tepehuanes, Ochoa-Martínez 277 (IEB, MEXU); April 1978, Tepehuanes, Mpio. Tepehuanes, Ochoa-Mtz. 277 (IEB). GUANAJUATO: 31 April 1964, M. León G. s.n. (ENCB). SAN LUIS POTOSÍ: 1878, Chiefly in the region of San Luis Potosi, C. C. Parry 173, E. Palmer (NY, US). SONORA: 29 March 1970, 4.6 mi S of Cucurpe. Clif-face along San Miguel River and road, L. A. McGill 6518 (NY); 21 April 1973, 13.5 mi. S. of Magdalena on road to Cucurpe, R. & M. Spellenberg 3053 (NY); 28 December 1976, 1 mile s. of Santa Ana, C. D. Johnson 223-76 (NY); 5 April 1932, 15 m. n. Magdalena, F. R. Fosberg 7511 (CAS, NY); 29 March 1970, 4.6 mi S of Cucurpe. Clif-face along San Miguel River and road, D. J. Pinkava 6518, L. McGill (NY); 22 March 1971, 12 mmi. N. of Santa Ana along Highway 15, R. & M. Spellenberg 2518 (ENCB, NY); 9 April 1939, So. of Santa Ana on road to Hermocillo, T. C. Frye 2323, E.M. Frye (CAS, NY); 14 April 1970, 4 mi NE of Magdalena on Hwy 15, Wm. F. Mahler 6088, J.W. Thieret (NY); 9 April 1939, South of Santana, on road to Hermosillo, T. C. Frye 2323 (NY, US); 21 April 1973, 13.5 mi. S. of Magdalena on road to Cucurpe, R. W. Spellenberg 3053 (NY). ZACATECAS: 27 March 1973, 7 km. airline NW. of San Juan de Ulua (Now called Primero de Mayo), M. C. Johnston, F. Chiang, T. Wendt 10430 (CAS); 31 March 1982, Camino a San Francisco de Órganos, M. González E. 342 (ENCB).