Astragalus nuttallianus DC. var. cedrosensis M. E. Jones,

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

62.2. Astragalus nuttallianus DC. var. cedrosensis M. E. Jones, Rev. N.-Amer. Astragalus 270. Pl. 68, 1923

Type:— MEXICO, Baja California, Cedros Island , 18–20 march 1889, Palmer 692 (holotype (based on Astragalus cedrosensis ) US: 00838929 digital image!; isotype: NY01268223!, NY00005815!, GH00059422 digital image!, US 00838930 digital image!) .

Astragalus cedrosensis Vasey & Rose, Contr. U. S. Natl. Herb. 1: 15. 1893.

Astragalus pertenuis Greene, Leafl. Bot. Observ. Crit. 2: 42. 1910. — Hamosa pertenuis Rydb., Bull. Torrey Bot. Club 54: 329. 1927.

Leaflets of two types on the same plant, those of the basal leaves retuse, the ones of the upper leaves elliptic or acute; calyx teeth 1–2 mm long, the trichomes appressed o slightly ascending, up to 0.8 mm long; calyx tube short, 1.4–1.7 mm long.

Distribution:— Distributed mainly on the Peninsula of Baja California. In Baja Californiafrom San Quintín (30°31’N – 116°02’W) to El Batequi (26°25’N – 112°46’W), also in the Cedros and Ángel de la Guarda (southern end) Islands. In Sonora, along the coast near San Carlos (27°58’N – 111°04’W), isolated in northern Chihuahua (Juárez, 31°35’N – 100°26’W). Also in California in the USA ( Fig. 19 ).

Habitat:— Volcanic, saline, basalt, clayey, reddish, silt soils; canyons with Pachycormus, Ambrosia, Simmondsia, Euphorbia , scrublands with Yucca, Opuntia, Pachycereus ; 460– 500 m.

Specimens examined:—BAJA CALIFORNIA: 11 March 1998, Vizcaino Desert, north of El Arco , N of Calmalli, along road between Rancho Esperranza and Rancho Miramar, J. Rebman 4874, N. Roberts ( BCMEX) ; 7 March 1889, San Jorge, T. S. Brandegee 536 ( NY) ; 1 May 1886, Northern Lower California, C. R. Orcutt s.n. ( NY) ; 10 February1962, Rocky flat behind beach ridge, about 9 miles south of Puerto San Jose, I. L. Wiggins, J. H. Thomas 191 ( CAS, US); 16 March 1966, Las Lagunitas, R. V. Moran 12699 ( NY) ; 7 July 1980, SE side of Laguna Mormona 7 km NW of San Quintin nuevo, R. Moran 28981 ( CAS, ENCB, NY, TEX-LL) ; 17 March 1962, South end of Pond Island Bay, Angel de la Guarda Island, R. Moran 8649 ( MEXU, NY) ; 16 March 1966, Rancho Las Lagunitas, R. Moran 12692 ( NY) ; 10 April 1931, Rosario Wash, I. L. Wiggins 5243 ( CAS, US); 23 February 1935, 24 miles S of Punta Prieta , I. L. Wiggins 7740 ( CAS) ; 16 February1962, Northwest end of Playa about 18 miles west of Bahia de los Angeles, 5 miles north of main road, I. L. Wiggins, J. H. Thomas 299 ( CAS) ; 18 March 1889 / 20-III1889, Cedros Island, E. Palmer 692 ( NY, US); 1887, Los Angeles Bay , Golf of California, E. Palmer 571 ( NY) ; 13 April 1949, 2–3 miles E of Punta Eugenia, Vizcaino Desert, H. S: Gentry 8673 ( MEXU) ; 15 March 1966, Peninsular divide at the Barril road, R. Moran 12679 ( NY) ; 1 March 1985, 10–20 km N of Puerto Santa Catarina on road to Rancho Santa Catarina, D. E. Breedlove 62262 ( CAS) ; 18/ 20 March 1889, Cedros Island, E. Palmer 692 ( MEXU) . BAJA CALIFORNIA SUR: 7 February1973, Arroyo San José 3 miles west of San José de Castro, R. V. Moran 19909 ( NY) ; 14 February1973, Arroyo San José, R. Moran 20131 ( NY) ; 7 February1973, Arroyo San José 3 miles west of San José de Castro, R. Moran 19909 ( NY) ; 26 March 1984, Pacific slope of Sierra de Placeros 35 km SE of Bahia Tortugas, D. E. Breedlove 60940 ( CAS, MEXU, NY) ; 21 April 1987, 12 Km al NE de Bahía de Tortugas, brecha a Viscaíno, P. Tenorio L. 12992, C. Romero de T. ( MEXU) ;. CHIHUAHUA: 31 March 1985, Sierra El Presidio, NW end of the Sierra near Mex. hwy., R. D. Worthington 12897 ( NY) . SONORA: 24 February1933, Llano beside railway 9 mi. North of Torres , I. L. Wiggins 6261 ( CAS, NY) ; 21 February1966, Guaymas, Colonia Peninsular, H. D. Ripley 14265 ( NY) ; 18 May 1925, Alamos, 30 miles from Mag, P. B. Kennedy 6999 ( CAS) ; 24 February1966, N slope of sierra behind Guaymas, H. D. Ripley 14292 ( NY) ; 6 March 1979, Pitiquito, Ejido Vicotria y Libertad, A. Castellanos, s.n. ( USON) ; 3 January 1995, Cañón del Nacapule, ca 4 km n of Bahía San Carlos , se side of Sierra del Aguaje, R. S. Felger 95-1, S. Schneider ( MEXU, SD) .

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.