Astragalus greggii S. Watson, Proc. Amer. Acad.

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

32. Astragalus greggii S. Watson, Proc. Amer. Acad. 17: 343. 1882

Type:— MEXICO, Coahuila, 6 miles E of Saltillo, 17/20 July 1880, Palmer 238 (holotype: not seen; isolectotype: Palmer 238 NA 0095610 digital image!; isotype: NY 00005796!; syntype: Mexico, 1848, J. Gregg 439 GH 00059413 digital image!, Coahuila, 6 miles east of Saltillo, 17/ 20 July 1880, Palmer s.n. PH 00005443 digital image!; isosyntype: Palmer 238 US 00004138 US digital image!, mountains E of Saltillo, February / October 1880, Palmer 258 MICH 1107108 digital image!) .

Hamosa greggii (S. Watson) Rydb., Bull. Torrey Bot. Club 54: 20. 1927.

Perennial. Stems up to 65 cm long, decumbent, creeping, diffuse, mostly branched and divaricatelly flexuose, the stems frequently in zig-zag, hispid-pubescent, the trichomes up 1.3 mm long, abundant, dense, perpendicular to the organ or retrorse, most evident in basal stems, petioles and peduncles, denser in young parts. Stipules 1.5–2.3 mm long, dimorphic, the lowest connate, the upper ones 2.5–7.5 mm long and free, lanceolate to deltoid. Leaves 2–11 cm long; leaflets 11–23, 3–22 mm long, ovate, ovate-oblong, oblong to obovate, entire and truncate, rounded to retuse, texture thin. Peduncles 2–13 cm long, extended or curved; the racemes 1–2.5 cm long, flowers 3–9. Flowers pink, purple, pale purple, becoming quickly ochroleucous or the petals ochroleucous and remaining so until drying; the calyx 5–6.7 × 2.3–2.6 mm, campanulate, oblique, hirsute, the trichomes white, the tube 2.1–2.6 mm long, the teeth 2.5–4 mm long, subulate to lanceolate, ventral pair the shorter; the banner 7.2–10.2 × 5.3–7.7 mm, recurved; the wings 7.2–9.2 × 2–2.7 mm, the claw 1.7–2.5 mm long, the blade 6.2–7.5 mm, oblique, oblong; the keel 6–7.2 × 2.3–2.9 mm, the claw 1.8–2.5 mm, the blade 4–5 mm long, semicircular. Pod pendulous, *stipitate (the stipe 0.2–3 mm long), or sessile, 1–1.8 × 0.3–0.4 cm, horizontal or ascending, slightly curved, narrowly oblong, triquetrous, laterally compressed or slightly rounded, narrow dorsally grooved, the valves thin, papery, glabrate, ochre o completely black with age, soflty reticulate, septum complete, thence, the pod bilocular, persistent; ovules 9–18; seeds 2.5–3 mm long, mitt-shaped, light-brown, brown.

Distribution:— Northeast Mexico, Coahuila (Múzquiz and Monclova), Nuevo León (Linares and Bustamante) and San Luis Potosí (Real de Catorce). *Estrada et al., (2016) ( Fig. 9 ).

Habitat:— Mountains, low hills, calcareous, alluvial and stony soils, metamorphic rocks, ravines, wet canyons, wet gullies, shaded areas; associated with Agave-Opuntia; piedmont scrub; oak forest;oak-pine forest; pine - cypress - oak - sycamore - poplar - association; oak - maple - necklacepod association; maguey, stool and agrito; Quercus forest; maple and broad leaved association; abandoned and disturbed crop areas; juniper-oak forest; pine - juniper forest; 580– 2600 m.

Comments:— Species easily discernible by the presence of hispid pubescence bearing long perpendicular or retrorse trichomes on stems and petioles. Two other related species, A. rupertii and A. pomphocalyx , with this type of pubescence are distributed in arid habitats of northeastern Mexico ( Villarreal & Carranza, 1994). They can be distinguished from A. greggi by the size and shape of the pod, in both of these later species, the pod is pendulous, shorter (less than 1 cm) inflated, strigose and partly covered by the calyx, the teeth shorter than the tube.

Specimens examined:—COAHUILA: 17 September 1999, J. A. Villarreal 8851, M. A. Carranza, D. Riskind J. Henrickson, T. Wendt, W. Wagner ( ANSM, IEB, TEX-LL) ; 9 May 1986, Sierra Potrero de Ábrego , camino Los lirios a Laguna de S´panchez, aproc. 15 km al NE de Los lirios, J. A. Villarreal 3249, M. A. Carranza ( ANSM, ENCB, IBUG, IEB) ; 2 August 1979, Puerto San Lorenzo , Cerro La Campana, Sierra Hermosa, Arteaga, L. Arce, s.n. ( ANSM) ; 3 August 1995, Sierra de Zapaliname , cañon de San Lorenzo, aprox. 3 km al SE de Saltillo, M. A. Carranza 2216, J. Encina ( ANSM, CIIDIR, MEXU) ; 31 August 1997, Sierra Rancho Nuevo , Cañón de San Juan, aprox. 2 km al N de San Juan, M. A. Carranza 2605, L. Zamora, D. Sánchez ( ANSM) ; 21 July 2015, Sierra de Zapalinamé , entrada al canon de Las Terneras, al sureste de ejido La Angostura , J. A. Encina 4934, J. M. Cárdenas, R. Monroy B. ( ANSM, MEXU) ; 20 June 1984, Arteaga , Los Lirios aprox. 35 Km. al Noreste de la carretera Nacional (57), J. A. Villarreal 2790, M. A Carranza, M. Vázquez ( MEXU) ; 20 March 1992, Cañón de San Lorenzo , 4 km al sur de Saltillo, J. A. Villarreal 6334, M. A Carranza ( ANSM, TEX-LL) ; 21 March 1992, Sierra de Arteaga , carr. 57, 3 km pasando el entronque a Los Lirios, J. A Villarreal 6461, M. A. Carranza, M. D. García ( ANSM, MEXU, TEX-LL) ; 17 VII-1880/ 20 July 1880, Mountains 6 mi E of Saltillo, E. Palmer 238 ( NY) ; 24 August 1975, Coahuila , Rincon de Maria, T. L. Wendt 1305, E. Lott, D. H. Riskind ( NY, TEX-LL) ; 30 March 1973, about 6 km airline W. of Saltillo , E. extremity of the Sierra de La Vega, at and below Estacion Microondas La Vega, M. C. Johnston 10501 A, T. L. Wendt, F. Chiang ( NY, TEX-LL) ; 30 June 1936, F. L. Wynd 375, Rancho Agua Dulce ; moist wooded canyon on the eastern slope of the Sierra de San Manuel, C. H. Muller ( NY) ; 22 July 1934, San Lorenzo Canyon , South of Saltillo, Sierra Madre Oriental, 1800–1900 m, F. W. Pennell 17497 ( NY) ; 3 August 1973, ca 35 (air) miles S of Monclova , in small side canyon, Henrickson 11756 ( IEB, MEXU) ; 27 April 1975, Rincón de Maria , on Hacienda La Babia, which is ca. 70 mi. by road NW from Muzquiz: fairly steep NE-facing slopes S. of “Slump Srping” in SW part of Rincón, T. Wendt 909, D. Riskind ( MEXU) ;. NUEVO LEÓN: 16 June 1994, Rancho Chaparral , Mpio, Santiago, Hinton et al. 24374 ( ANSM, IEB, MEXU, TEX-LL) ; 24 April 1981, Santa Rita , Mpio. Galeana, Hinton et al. 18164 ( ANSM, CIIDIR, ENCB, IEB, MEXU, TEX-LL) ; 10 October 1984, Áreas cercanas a Cola de Caballo, Mpio, Santiago J. A. Villarreal 3007, M. A. Carranza, M. Vázquez ( ANSM) ; 7 June 1988, San José de la Martha , árweas próximas al ejido, J. A. Villarreal 4370, M. A. Carranza, M. Vázquez, D. Markwalder ( ANSM) ; 15 April 2001, Km 14 por la brecha de Bustamante rumbo a Minas Viejas, Mpio. Villa Aldama, E. Estrada 12356 ( CFNL) ; 9 April 2001, Sierra Lampazos , por la entrada a minas de yeso de Lampazos, Mpio. Lampazos, E. Estrada 12002 et al. ( CFNL) . SAN LUIS POTOSÍ: 17 May 1973, 1 km. by winding road below and W. of Real de Catorce , on road to Estacion Catorce; above Sacavnon La Purisima, M. C. Johnston 11067 D, T. L. Wendt, F. Chiang C. ( MEXU, NY) ; 25 August 2013, Parte alta del Cerro Quemado, Mpio. CCCCatorce, S. Zamudio 16417 ( IEB) . ZACATECAS: 22 September 1973, 16 (air) miles E of Concepcion del Oro, on upper north side of Sierra del Astillero , ca 3 miles NE of Guadalupe Garceron, ½ mile N of summit, J. S. Henrickson 13362 ( MEXU, TEX-LL) .

Figures

FIGURE 9. Map showing the distribution of Astragalus goldmanii, A. greggii, A. gruinus, and A. guanajuatensis in Mexico.