62.6. Astragalus nuttallianus DC. var. zapatanus Barneby, Field and Lab. 24: 36. 1956

Type:— USA, Texas, Webb. County, Laredo, 15 March 1917, E. J. Palmer 11289 (holotype: NY00005571!) .

Foliage dark-geen, the leaflets regardless of their shape, always all retuse or truncate and the ovary pubsecent.

Distribution:— Restricted in Mexico northern Tamaulipas, along the Bravo River (Fig. 60). Also, in Texas (USA) (Fig. 19).

Specimens examined:— TAMAULIPAS: 2 December 1939, Tamaulipas, H. LeSueur (TEX-LL); 17 March 1962, Tamaulipas, M. Domínguez M., W. L. McCart (TEX-LL) . TEXAS: 15 March 1917, Webb County, Laredo, E. J. Palmer 11289 (NY) .