Astragalus nuttallianus DC var. nuttallianus

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

62.4. Astragalus nuttallianus DC var. nuttallianus

Type:— USA, Arkansa (sic), On the plains of Red River , cultivated in the garden of the University of Pennsylvania , not date, Nuttall s.n. (holotype: PH (not found); isotype: BM000795463 digital image!; lectotype: G. Engelmann s.n. MO-149254 digital image!;) .

Astragalus nuttallianus DC., Prodr. [A. P. de Candolle] 2: 289. 1825. — Hamosa nuttalliana (DC.) Rydb., Small, Fl. S. E. U. S. 617: 1332. 1903. — Astragalus nuttallianus DC. var. enneajugus M. E. Jones, Contrib. W. Bot. 8: 22. 1898. — Astragalus nuttallianus DC. var. quadrilaterlis M. E. Jones Contrib. W. Bot. 8: 22. 1898.

A. micranthus Nutt., Jour. Acad. Philad. 2: 122. 1821 (non Desv. 1814). — Tragacantha micrantha Kuntze, Revis. Gen. Pl. 2: 941. 1891.

Foliage dark-geen, the leaflets regardless of their shape, always all retuse or truncate and the ovary glabrate.

Distribution:— In Mexico, recorded in northeastern Coahuila (municipallity Sabinas) and northern Nuevo León (municipallity Villaldama). Also, in Oklahoma, Arkansas, and Texas into the USA ( Fig. 19 ).

Habitat:— Rocky slopes; scrublands; acacia scrubland; oak forest; 1170 m.

Speciemens examined:— COAHUILA: 16 February1987, Carretera Roncesvalles.Barroterán , Mpio. Múzquiz, R. Vázques s.n. ( ANSM, ENCB) ; 3 April 1969, 56 miles south of Eagle Pass , Texas, E. Lehto 15774, Pinkava, Keil ( NY) . NUEVO LEON: 16 April 2001, Rancho Minas Viejas , camino hacia las Pilas, Mpio. Villadlama, E Estrada 12376 ( CFNL) ; 17 March 1981, Carretera Monterrey-Lampazos, Cerro Colorado, Mpio. Lampazos, O. Briones 536 ( ANSM) ; n.d. March 1981, Montemorelos, M. Almaguer s.n. ( ANSM, CIIDIR) .

Figures

FIGURE 19. Map showing the distribution of Astragalus nuttallianus var. nuttallianus, A. nuttallianus var. austrinus, A. nuttallianus var. cedrosensis, A. nuttallianus var. imperfectus, A. nuttallianus var. trichocarpus, and A. nuttallianus var. zapatanus in Mexico.