Astragalus didymocarpus Hook. & Arn. var. didymocarpus

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

19.1 Astragalus didymocarpus Hook. & Arn. var. didymocarpus

Type:— USA, California, Douglas, Douglas s.n. 1833 (holotype: K 000999251 digital image!; isotype: G 00386354 digital image!, NY 0005398 digital image!

Tragacantha didymocarpa (Hook. & Arn.) Kuntze, Revis. Gen. Pl. 2: 944. 1891.— Hesperastragalus didymocarpus (Hook. & Arn.) A. Heller, Muhlenbergia 2(18): 87. 1905.— Astragalus didymocarpus Hook. & Arn.var. daleoides Barneby, Aliso 2(3): 212. 1950.

Astragalus catalinensis Nutt. , Jour. Acad. Nat. Sci. Philadelphia 4(1): 9. 1848; Hesperastragalus catalinensis (Nutt.) Rydb., Bull. Torrey Bot. Club 53(3): 169. 1926.

Hesperastragalus compactus A. Heller , Muhlenbergia 2(2A): 218–219. 1906.

Characteristics as in the key. * I. L. Wiggins 5232 (CAS); ** I. L. Wiggins 5245 (CAS).

Distribution:— From Tijuana to Sierra Juárez; west coast through Ensenada, San Quintín to El Rosario and Punta Baja. Also, in California and Nevada ( USA) ( Fig. 5 ).

Habitat:— Sandy flats; sandy-gravelly roadbanks, clay soil; canyons along roads; vernal lakes; roadside; grassy claearings; arroyo beds; granite and sandy soils; plains; canyons; valleys; abandoned and cleared fields; coastal succulent scrub; burned pastures; chaparral; coastal scrub; saline ponds and salt flat; juniper forests; Pinus forest; 30–1625 m.

Specimens examined:—BAJA CALIFORNIA: 12 April 1882, Ensenada, M. E. Jones n.n ( NY) ; 19 April 1886, San Telmo, C. R. Orcutt s.n. ( CAS, NY) ; 1-?-1889, San Quinin, E. Palmer 614 ( CAS, NY, US) ; 10 April 1931, Rosario Wash., I. L. Wiggins 5245 ( CAS, NY) ; 9 April 1931, Small canyon 10 miles north of Rosario , I. L. Wiggins 5232 ( CAS, NY, TEX-LL) ; 4 April 1958, 14.0 km northwest of Colonia Guerrero, P. H. Raven 12219, H. Lewis, H. Thompson ( CAS) ; 17 April 1958, San Quintin , P. H. Raven 12344, M. Mathias, J. Turner ( CAS) ; 25 March 1949, 1 mile north of west side of Laguna Santa Maria near San Quintin , J. H. Thomas 171 ( CAS) ; 7 April 1936, San Quintin , C. Epling, Wm. Stewart s.n. ( CAS) ; 4 June 1941, San Telmo Plains 7 miles east of san Telmo on road to Rancho San Jose (Meling’s Ranch), I. L. Wiggins 9725 ( CAS) ; 7 July 1980, SE side of Laguna Mormona , 7 km NW of San Quentín Nuevo, at edge of a barley field bordering a salt flat, R. Moran 29005 ( SD) ; 22 May 1965, Canyon 8.3 miles north of San Vicente on Ensenada Hwy , base of west-facing slope, P. Mudie 466 ( SD) ; 9 May 1978, Sierra San Pedro Martir, on north slope, 9 km west of San José , R. Moran 25806 ( SD) ; 25 March 1973, Ca. 2 km east of the eastern shore of Laguna Mormona, in abandoned field, P. J. Mudie 1113-11 ( SD) ; 24 March 1973, Boca de Arroyo San Telmo, ca. 1.5 miles south of Cabo Colnett , saline pond & salt flat behind high (ca. 4 meters) cobble berm spanning the mouth of the arroyo, P. J. Mudie 1017 ( SD) ; 4 April 1982, Cañon San José, 17 km east of San Vicente , in sandy arroyo bed, R. Moran 30265 ( CAS, SD) ; 11 April 1982, 4 km east of Agua Grande & 15 km NW of San Vicente, in grassy clearing, R. Moran 30403 ( SD) ; 19 April 2013, Reserva Natural de Valle Tranquilo: between San Quintin and El Rosario; in Arroyo Hondo, approximately 5 miles east of Mex. Hwy. 1, J. Rebman 25997b, S. Vanderplank, J. Riley ( SD) ; 23 March 1998, Playa Seca, south of Cataviña and north of Laguna Chapala , along the east side of Mex Highway 1., J. M. Porter 11615, L. E. Machen. ( CAS, SD) ; 28 May 1983, Sierra de Juarez, Laguna Hanson, Constitucion National Park , north end of the lake on sandy marsh delta & wet margins of the lake, R. F. Thorne 55811, W. Wisura, W. Steinmetz, et al. ( CAS, SD) ; 16 April 1984, East shore of Laguna Hansen., A. Romspert s.n. ( CAS, SD) ; 9 May 1985, S of El Condor : 0.5 –2.3 miles sout, R. F. Thorne 60600, W. Wisura ( MEXU, SD).

Figures

FIGURE 5. Map showing the distribution of Astragalus crotalariae, A. daleae, A. coccineus, A. didymocarpus var. didymarpus, A. didymocarpus var. dispermus, and A. didymocarpus var. obispoensis in Mexico.