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!, US00838930 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 February1935, 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) .