Astragalus nuttallianus DC. var. trichocarpus Torr.

Castillón, Eduardo Estrada, Quintanilla, José Ángel Villarreal, Delgado-Salinas, Alfonso & Rebman, Jon P., 2023, The genus Astragalus (Leguminosae: Papilionoideae: Galegeae) in Mexico, Phytotaxa 586 (1), pp. 1921-1935 : 1921-1935

publication ID	https://doi.org/ 10.11646/phytotaxa.586.1.1
DOI	https://doi.org/10.5281/zenodo.7713897
persistent identifier	https://treatment.plazi.org/id/0D132D31-FFF5-5F42-B6AE-AF3FFD292DE0
treatment provided by	Plazi
scientific name	Astragalus nuttallianus DC. var. trichocarpus Torr.
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Treatment

62.5. Astragalus nuttallianus DC. var. trichocarpus Torr. View in CoL & A. Gray, Fl. N. Amer. 1: 333. 1838

Type:— USA, Texas, 1833, T. Drummond s.n. (holotype: NY00005570 !; isotype: US00004252 digital image!, BM001042704 digital image!) .

Astragalus trichocarpus Scheele , Flora 26 (No. 27): 442. 1843.

Leaflets elliptic to ovate, obtuse to acute, rarely some leaflets retuse; calyx teeth 1.5–3 mm long, the trichomes hispid to ciliate, up to 1.2 mm long; pod hirsute, the trichomes up to 1mm long.

Distribution:— Exclusive of north of Mexico, at several isolated localities; central Chihuahua (surrounding Chihuahua City, 28°39’N – 106°05’W), northwest Durango (Tepehuanes and Luis Moya, 25°20’N – 105°43’W) and southwest Coahuila (Estación Carneros, 25°07’N –10106’W). Also, in Texas ( USA) ( Fig. 19 View FIGURE 19 ).

Habitat:— Clayey, sandy, gravelly and stony soils; desert scrub; acacia scrubland; grasslands; 200–1981 m.

Comments:— Sometimes forming dense colonies, giving the landscape a bluish color.

Specimens examined:—CHIHUAHUA: 4 April 1885, Hills and plains near Chihuahua, C. G. Pringle 276 ( NY, MEXU, US) ; 13 April 1891, Puente de St. Diego , C. V. Hartman 595 ( NY) ; 14 April 1886, Plains near Chihuahua, C. G. Pringle 853 ( NY) ; 1–21 May 1908, Vicinity of Chihuahua , E. Palmer 171 ( NY) . COAHUILA: 23 October 1963, Carneros Pass , 23 miles s. of Saltillo, H. D. Ripley, R. C. Barneby 13268 ( NY) ; DURANGO: 10 November 1963, Luis Moya, H. D. Ripley, R. C. Barneby 13508 ( NY) ; 4–25 June 1906, Tepehuanes, E. Palmer 259 ( NY) ; 4 June 1906, Collected at Tepehuanes, E. Palmer 259 ( NY) .