Astragalus micranthus Desv. var. seatoni (M. E. Jones) 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

58.2. Astragalus micranthus Desv. var. seatoni (M. E. Jones) Barneby, Mem. New York 164. 1928

Type:— MEXICO, Veracruz, Mt. Orizaba , 10,000° alt., 6 August 1981, H. E. Seaton (holotype: no lo encuentoro como tale n US, es el isosyntype; isosyntype: US00001579 digital image!) .

Distribution:— Endemic to Mexico, with a narrower distribution than the previous one, recorded in southern Hidalgo at the northwestern border with Puebla (at the height of Acaxochitlán and Huauchinango), southern end Hidalgo (Tepeapulco, Apan and Almoloya), almost to the border with Tlaxcala, western Puebla on the border with Veracruz and central Oaxaca ( Fig. 17 ).

Habitat:— Ruderal weed; mountainous areas; oak-pine forest, along roads, flooded areas; 2250–2750 m.

Specimens examined:—HIDALGO: 10 August 1981, 6 km al NW de Apan , Mpio.Apan, R. Hernández M. 6308 et al. ( CAS, ENCB) ; 6 April 1981, 2 kms. al sur de Epazoyucan, R. Hernández Magaña 5969, L. Cortés, I. Hernández ( CAS, ENCB, MEXU) ; 16 August 1974, Río Frío , 15 km Río Frío, Estación Forestal Zoquiapan, C. Rodríguez 1266, E. García, J. García ( ENCB) ; 24 June 1981, 4 km a E de Tlaxiaca , Mpio. Tlaxiaca, R. Hernández M. 6140 ( ENCB) ; 20 June 1981, Carretera a Tolcayuca, cerca de entronque a Pachuca, M. Equihua 763 ( IEB) ; 2 August 1963, 2 km al N de Ciudad Sahagún , sobre la carretera a Tlanalapan, Rzedowski 16989 ( IEB) . MEXICO CITY: 25 September 1966, 3 km al SW del Ajusco, R. Cruz C. 1334 ( ENCB) ; 14 August 1960, Alrededores de la Estación La Cima , Serranìa del Ajusco, Rzedowski 12594 ( ENCB) . PUEBLA: VII-1911, Calchicomula, J. N. Rose 5660, Hay ( NY) ; 27 June 1899, Between Tepeaca + Santa Rosa, J. N. Rose s.n., W. Rough ( US) ; 19 July 1947, about three miles east of Rio Frio, C. M. Rowell, G. L. Webster F. A. Barkley 17M370 ( ENCB, MEXU) ; 12 August 1901, Hills above Chalchicomula, C. G. Pringle 8562 ( MEXU) . STATE OF MEXICO: 4 August 1958, Near Kilometer 72 on Amecameca-Popocatepetl road, J. H. Beaman 2118 ( MEXU, US) ; 18 July 1938, Ojos de Aguato Toluca , E. K. Balls 5063 ( US) ; 23 July 1967, Parque Nacional Miguel Hidalgo y Costilla, (La Marquesa), Mpio. Lerma, Sánchez León 67 ( ENCB) ; not date, San Pedro Nexapa, M. Villegas D. s.n. ( ENCB) . VERCARUZ: 12 July 1971, Carretera 140, limite Edos. Puebla-Veracruz, L. I. Nevling 1610 ( MEXU, NY) ; 7 July 1970, Totalco, F. Ventura A. 1533 ( ENCB, IEB, MEXU) ; 25 August 1975, 3 km al S de Totalco , Mpio. Totalco, M. Velázquez 2083 ( ENCB) .

Figures

FIGURE 17. Map showing the distribution of Astragalus mario-sousae, A. martinii, A. micranthus var. micranthus, and A. micranthus var. seatoni in Mexico.