Astragalus magdalenae Greene var. niveus (Rydb.) Barneby

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

55.2. Astragalus magdalenae Greene var. niveus (Rydb.) Barneby , Aliso 4: 135. 1958

Type:— MEXICO, Baja California, 15 miles north of San Felipe Bay , February 1904, D. T. MacDougal s.n. (holotype (based on Phaca nivea ): NY00005930 !).

Phaca nivea Rydb., N. Amer. Fl. 24: 328. 1929.

Stems erect or ascending, sometimes diffuse; leaflets 15–23; petals purple, red-purple, deep-purple, rose-pink, lilac tinted or only in the tip; banner 11–12.5 mm long; pod 1–2 cm long; seeds 2.5–3.3 mm long.

Distribution:— Endemic to the Peninsula of Baja California and Sonora, in small areas of Baja California and around its border with Baja California Sur and in Sonora. In Sonora, only found at Puerto Peñasco and nearby areas. In Baja California, isolated in three different localities, one on the west coast, between Mission Santa Maria (30°24’N – 115°52’W) and Nueva Odisea (30°22’N – 115°52’W), another, on the geopolitical border of both two states on the peninsula, near Guerrero Negro (27°58’N – 114°04’W), on the eastern coast in areas bordering El Molino (29°46’N – 114°24’W) ( Fig. 16 ).

Habitat:— Coastal dunes; sandy soils with disturbance; dry scrublands.

Specimens examined:—BAJA CALIFORNIA: 15 February1986, Torrentes Canyon: east slope of Sierra Juarez , about 1 mi S of Cantu Palms, S. D. Boyd 1300 ( MEXU, NY) ; 19 September 1980, In the Sonoran Desert about 15 miles north of Guerrero Negro along Hwy #1, near km post 120, A. C. Sanders 2001, K. R. Naisess, J. West ( NY) ; 3 March 1966, Coastal dunes, Ensenada de San Francisquito, R. Moran 12388 ( NY) ; 2 March 1935, Mouth of arroyo along beach at Barril, 48 mi. E. of Pozo Aleman , I. L. Wiggins 7824 ( CAS) ; 19 September 1980, In the Sonoran Desert about 15 miles north of Guerrero Negro along Hwy #1, near km post 120, A. C. Sanders 2001, K. R. Neisess, J. West ( NY) ; 4 January 1994, Guerrero Negro , on the east side of town along the road, N. D. Atwood 19069 ( NY) . BAJA CALIFORNIA SUR: 4 January 1994, Guerrero Negro, on the east side of town along the road, D. Atwood 19069, K. Anderson, K. Thorne ( NY) ; 3 March 1966, Coastal dunes, Ensenada de San Francisquito, R. Moran 12388 ( CAS, NY) . SONORA: 25 March 1948, Cholla Beach, 8 miles north of Puerto Penasco, R. Bacigalupi 2872 ( CAS, NY, SD) ; 27 February1958, Cholla Bay, Punta Peñasco, P. H. Raven 11674A ( NY) ; 25 April 1921, The Gulf of CaliforniaTepoca BayFrequent on sanddunes, I. M. Johnston 3306 ( CAS, US) ; 19 March 1979, Commonon dunes N of La Choya Bay, ca. 5 miles N of the town of Puerto Peñasco, A. F. Johnson 4038 ( MEXU) ; 20 March 1979, common on semistable back-dunes N of La Choy Bay, ca. 5 miles N of the town of Puerto peñasco, A. F. Johnson 4044 ( MEXU) ; 26 March 1979, rare on dune ca. 2 miles of town of Puerto Libertad, A. F. Johnson 4102 ( MEXU) ; 20 February1980, frequent on dunes near thee Gulf of California, at the town of El Golfo de Santa Clara , A. F. Johnson 5116 ( MEXU) ; 11 May 1983, 3.9 miles S of Rio Socorro, B. A. Prigge 4582 ( MEXU) ; 23 March 1978, beach dunes, estero Morua , E of Puerto Peñasco, G. L. Webster 22383 ( MEXU) .

Figures

FIGURE 16. Map showing the distribution of Astragalus lyonnetii, A. magdalenae var. magdalenae, A. magdalenae var. niveus, and A. magdalenae var. peirsonii in Mexico.