The genus Astragalus (Leguminosae: Papilionoideae: Galegeae) in Mexico Author Castillón, Eduardo Estrada 0000-0003-1061-9862 Universidad Autónoma de Nuevo León, Facultad de Ciencias Forestales, A. P. 41, 67700, Linares, Nuevo León, Mexico aeduardoestradac @ prodigy. net. mx; https: // orcid. org / 0000 - 0003 - 1061 - 9862 aeduardoestradac@prodigy.net.mx Author Quintanilla, José Ángel Villarreal 0000-0001-9672-8693 Universidad Autónoma Agraria Antonio Narro, Departamento de Botánica, Saltillo, Coahuila, Mexico javillarreal 00 @ yahoo. com; https: // orcid. org / 0000 - 0001 - 9672 - 8693 javillarreal00@yahoo.com Author Delgado-Salinas, Alfonso 0000-0002-9322-9968 Universidad Nacional Autónoma de México, Instituto de Biología, 21068 adelgado @ ib. unam. mx; https: // orcid. org / 0000 - 0002 - 9322 - 9968 adelgado@ib.unam.mx Author Rebman, Jon P. 0000-0003-1061-9862 Universidad Autónoma de Nuevo León, Facultad de Ciencias Forestales, A. P. 41, 67700, Linares, Nuevo León, Mexico aeduardoestradac @ prodigy. net. mx; https: // orcid. org / 0000 - 0003 - 1061 - 9862 & San Diego Natural History Museum, P. O. Box 121390, San Diego, California, 92112 jrebman @ sdnhm. org; https: // orcid. org / 0000 - 0002 - 4150 - 7356 & Universidad Autónoma de Nuevo León, Facultad de Ciencias Forestales, A. P. 41, 67700, Linares, Nuevo León, Mexico aeduardoestradac @ prodigy. net. mx; https: // orcid. org / 0000 - 0003 - 1061 - 9862 aeduardoestradac@prodigy.net.mx text Phytotaxa 2023 2023-03-07 586 1 1921 1935 http://dx.doi.org/10.11646/phytotaxa.586.1.1 journal article 10.11646/phytotaxa.586.1.1 1179-3163 7703999 17. Astragalus crotalariae (Benth.) A. Gray, Proc. Amer. Acad. Arts 6: 216. 1864 Type:— USA , California , Monterey , California, Coulter 436 K ( holotype K ) not seen. Phaca crotalariae Benth., Pl. Hartw. 307. 1848. — Tragacantha crotalariae (Benth.) Kuntze, Rev. Gen. 2: 944. 1891 . Astragalus limatus E. Sheld. , Minnesota Bot. Stud. 1(3): 126–127. 1894 . A. preussii A. Gray var. limatus (E. Sheld.) Jeps., Man. Fl. Pl. Calif. 566. 1925. Perennial , hard, with bad smell. Stems up to 70 cm long, striate, hollow, green-yellowish, strigose to pilose, the trichomes up to 1.3 mm long. Stipules 3.7–13 mm long, ovate, wider than longer, clasping to semi-clasping, not connate. Leaves 5–16 cm long, the leaflets 5–17, 5–36 mm long, elliptic, oblong, obovate to spathulate, rarely suborbicular, retuse, glabrate or scarcely pilose adaxially. Peduncles , 5–17.5 cm long, straight, hard; the racemes 2–9 cm long, flowers 10–27, ascendant. Flowers rose, purple, magenta, turning violet when dry, rarely totally white; the calyx 7.5–12.4 × 3.5–6.7 mm , papery, strigose or pilose, the trichome black and white, the tube campanulate to subcylindrical, 6.3–6.7 mm long, reddish or with reddish-purple tones, the teeth triangular to subulate, 1.2–2.7 mm long; the banner 21–28 × 8–14 mm , rhombic to spathulate, entire o slightly emarginated apically; the wings 19–25 mm × 3–5 mm , linear to oblong, to oblong-obovate, the claw 8.5–11.4 mm long, the blade 10.6–15 mm long; the keel 17.3–22 × 3–5.2 mm , incurved, the claw 8.6–11.4 mm long, the blade 8.6–11 mm long. Pod estipitate, the stipe 1–1.4 mm long, the body 2–3 × 1–1.6 cm , spread or ascendant, somewhat compressed laterally, elliptic, ovoid, abruptly or gradually narrowed at base, inflated but somewhat leathery, the apex with a curved ot straight short beak, the valves sparsely or densely strigose, yellowish, light-brown, brown to dark-brown, lightly reticulate, septum absent; ovules 24–38; seeds 3–4.4 mm long, brown or brown-purple, opaque. Distribution:— In Mexico, known only in the extreme north of the state of Baja California , adjacent to the border with the USA . New River (apparently translated from Río Nuevo, river located near Mexicali). Also present in Arizona and California ( USA ) ( Fig. 5 ). Habitat:— Rare, only one record, registered in scrubland areas. Also in Arizona and California ( USA ). Comments:— A. crotalariae is distinguished by its large flowers ( 23–28 mm long) and restricted distribution in Mexico . Specimens examined:— BAJA CALIFORNIA : 2 April 1905 , Plains of New River , T. MacDougal 223 ( NY ) .