Astragalus strigulosus Kunth, 2023

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

92. Astragalus strigulosus Kunth , Nov. Gen. Sp. 6. 494

Type:— MEXICO, Hidalgo, Crescit in temperatis Regni Mexicani, prope Moran (Morán or Real de Morán , between Pachuca and Actopán), alt. 1330 hex, 1803, A. von Humboldt & A. Bonpland s.n. (holotype: P 00659958 digital image!) .

Tragacantha strigulosa (Kunth) Kuntze, Revis. Gen. Pl. 2: 948. 1891. — Atelophragma strigulosum (Kunth) Rydb., Bull. Torrey Bot. Club 55: 158. 1928.

Perennial. Stems up to 90 cm long, almost always erect when young or ascending to slightly decumbent with age, hard, strigose to pilose, subglabrous or pubescent, trichomes up to 0.7 mm long, sub-apressed, stiff. Stipules 2.5–9 mm long, the lowest ones connate up to the half of its length, the rest basally connate or clasping but distally free. Leaves 4–10 cm long, leaflets 13–29, 6–22 mm long, oblong, oblong-elliptic to elliptic, distally obtuse or notched and mucronate, rarely acute, adaxially glabrate or pubescent on margins. Peduncles 4–10 cm long; the racemes 1.5–9.3 cm long, dense when young, flowers 12–40, deflexed. Flowers white, light-yellow to ochroleucous; the calyx 5–7.5 × 2.2–2.8 mm, pilose, trichomes black or black and white mixed, the tube 2.6–3.2 mm long, campanulate, the teeth 2.5– 4.3 mm long, lanceolate to subulate, one pair shorter than the rest; the banner 9–11.5 × 4.2–6 mm, obovate, rhombic to oblanceolate, slightly to deeply notched; the wings 7.4–10.5 × 1.8–2.5 mm, the claw 3–3.5 mm long, the blade 5.5–7.5 mm long, oblanceolate, distally oblique, incurved; the keel 6.7–7.5 × 2.1–2.6 mm, the claw 3–3.5 mm long, the blade 4.2–4.8 mm long, dorsally distally oblique, almost obovate, incurved. Pod 12–20 × 4–7 mm, deflexed, stipitate (stipe 2–4 mm long), widened, dorsoventrally compressed, elliptic to oblong, almost always straight, sometimes recurved, wide cuneate in both ends, distally short apiculate, ventrally carinate, dorsally wide sulcate, the valves fleshy, turning papery-stiff, green, glabrate, ochre or even black with age, reticulate, trichomes almost always black, rarely white ones present, septum complete, the pod thence bilocular or almost so, opening dorsaly but only in the base; ovules 14–19; seeds 1.8–2.3 mm long, mitten shape, brown to green-olive, opaque, smooth.

Distribution:— From southern Durango, through San Luis Potosí, Jalisco, Hidalgo, Jalisco, Michoacán, Morelos, Puebla, through State of Mexico, Tlaxcala, and Oaxaca ( Fig. 26 ).

Habitat:— Eroded ravines; canyons, reddish stony, volcanic and andesitic soils; scrub and grassland on hillsides; sclerophyllous, xerophilous and subtropical scrub with; oak forest; disturbed juniper forest; pine - juniper, pine - oak forest; areas with disturbance; disturbed areas; crop fields; grasslands in flat areas; 1860–3025 m.

Comments:— Whitin the area of distribution of this species, nine other species of Astragalus with stipitate oblong, elliptic, ellipsoid, somewhat widened, never inflated like bladder or triquetrous pods can be found. Of these, only four species, A. guatemalensis , A. jaliscensis , A. radicans , and A. zacatecanus have mainly white to ochroleucous flowers (rarely pale pink or bluish in A. guatemalensis ). Astragalus radicans is distinguished by its rooting stems, A. zacatecanus by its short flowers and its banners up to 9 mm long. The remaining three species, A. guatemalensis , A. jaliscensis , and A. strigulosus constitute a complex of species almost identical morphologically, their differences are extremely subtle. In general terms, the morphological characters are extremely variable in all three of these species, in this sense, almost all of plants have overlapping measures in the characters, making it difficult to use a single character to differentiate them. Perhaps the most obvious characters separating A. guatemalensis from the others is its pubescent ovary and the pod opening totally along its dorsal suture. The length (20–38 mm) and the width (6–7 mm), and the proportion (4–5 times longer than wide) of the measurements of the Atragalus jaliscensis pod, is perhaps the only other characteristic to differentiate it from A. strigulosus (proportion 2–3 longer than wide).

Specimens examined:—DURANGO: 22 June 1975, Collected 20.5 miles east of El Salto , D. G. LeDoux 1916, Dunn ( ENCB, NY, TEX-LL) ; 3 September 2003, Área NAtural Protegida: Sierra de Guadalupe. Dlegación Gustavo A. Madero, México, D.F, J. E. Rivera 3363 ( MEXU) . HIDALGO: 20 September 1906, Calcareous mesas, Metepec Station , 2438 m, C. G. Pringle 10311 ( ENCB, MEXU) ; 26 August 1963, San Gregorio, Rzedowski 16964 ( ENCB, MEXU) ; 13 August 1990, San Agustín Tlaxiaca—Camino de terracería Benito Juárez-Chapultepec de pozos, aprox. 1 km antes de llegar a la desviación a “La Virgen” sierra del monte alto de Temoaya, ejido Puerto México. I. Díaz V. 830 ( MEXU) ; 7 September 1963, L. González s.n. ( MEXU) ; 28 July 1956, 0 miles south of Actopan, growing in waste area between Agave fields, 2134 m, J. Thompson 84, O. S. Fearing ( ANSM, TEX-LL ; 22 June 1904, Metepec Station (Hidalgo), C. G. Pringle 13263 ( CAS) ; 20 September 1906, Calcareous mesas, Metepec Station , 2438 m, C. G. Pringle 10311 ( CAS, MEXU, NY, US) ; 3 October 1971, 1 km al SE de Tepeapulco , F. Jiménez S. 197 ( CAS, ENCB, TEX-LL) ; 1 July 1978, Epazoyucan — 0.5 km al NE de Nopalillo, M. Medina C. 2148 ( CAS, ENCB, IEB, MEXU) ; 4 October 1974, 1 km al NW de Tolcayuca, Mpiop. Tolcayuca , J. D. Flores L. 124 ( CAS, ENCB, MEXU) ; 5 September 1980, Rancho Mazatepec, 1 km al N de Santo Tomás, al S de Singuilucan, Mpio. Zempoala , R. H. Hernández Magaña 4894 ( CAS, ENCB, MEXU) ; 22 July 1905, Near Tulancingo, State of Hidalgo , J. N. Rose 8835, J. H. Painter, J. S. Rose ( NY) ; 1 July 1966, Hidalgo, Cerro de San Isidro (between Haciendas San Isidro and Tetlapayac) along road, 9 km. ESE. of APAM, R. C. West J-6 ( NY) ; 19 June 1966, 10 km. NE of APAN (NE-SE slopes), R. C. West B-26 ( NY) ; 24 June 1966, 2 km NE of APAM. S. slope R. C. West D-4 ( ENCB, NY) ; 24 October 1991, Ajacuba—Aprox. 1.5 km despuès del poblado Emiliano Zapata , rumbo a Ajacuba (de E a W), ej. Tecomatlàn I. Díaz V. 965 ( IEB, MEXU) ; 14 September 1975, 4 km al NE de Pachuca, sobre la carretera a Real del Monte , Rzedowski 33560 ( ENCB, IEB) ; 20 September 1906, Metepec Station , C. G. Pringle 10311 ( MEXU) ; 24 August 1972, Epazoyucan—Nopalillo Rzedowski 29224 ( MEXU) ; 25 June 1981, Zempoala—Sierra de los Pitos G. Benítez 824 ( MEXU) ; 30 August 1979, km 40.5 de la carretera Cd. Sahagún-Pachuca. Cultivos de cebada y maíz, F. J. Espinosa G. 702 ( MEXU) ; 10 August 1981, 6 km NW de Apan, Mpio. Apan , R. Hernández M. 6311 ( ENCB) ; 29 August 1965, Cerro Ventoso, entre Pachuca y Real del Monte , Rzedowski 20598 ( ENCB) ; 24 August 1972, Epazoyucan—Nopalillo Rzedowski 29244 ( ENCB) ; 31 August 1980, 2 km al N de Huxmi, Mpio. Tlaxiaca, Rzedowski 36962 ( ENCB) ; 7 September 1963, El Ocote , Mpio. Epazoyuca, R. Cruz C. 1029 ( ENCB) ; 22 June 1969, Pachuquilla, H. Puig 4795 ( ENCB) ; 25 June 1968, 6 km al NE de Tepeapulco , faldas del Cerro Xihuingo, D. García S. 2642 ( ENCB) ; 15 October 1978, 6 km al N de Tlanalapan, Mpio. Tlalnalapan , I. Piña s.n. ( ENCB) ; 17 August 1975, 5 km al NNE de San Juan Tizahuapan, Mpio. Epazoyucan , M. Medina C. 686a ( ENCB) ; 6 July 1975, Ranchería Buenavista , 8 km al E de San Marcos, Mpio. Otumba, C. Fuentes M. AIII-43 ( ENCB) ; 26 November 1970, Entre Pachuca y Real del Monte , J. Espinosa 949 ( ENCB) . JALISCO: 18/ 21 November 1953, Sierra de Cuale, southwest of Talpa de Allende; southwest of the prominent peak called Piedra Rajada ; pine forests near summits, on steep south- and west- facing slopes, 1800–2250 m, R. McVaugh 14382, J. Sooby ( US) ; 12 October 1952, Northeastern slopes of the Nevado de Colima, below Canoa de Leoncito ; steep mountainsides in pine- oak forest, 2250–2550 m, R. McVaugh 13457 ( MEXU, US) ; 13 July 1972, Concepción de Buenos Aires, Sierra del Tigre , L. M. Villarreal P. 3977 ( IEB) ; 24 August 1972, Nopalillo , Mpio. Epazoycuan, Rzedowski 29944 ( ENCB) . MEXICO CITY: 14 September 2005, La Armelia. A 1120 m LR en dirección SO del Picacho El Fraile. Area Natural Protegida: Delegación Gustavo A. Madero, A. Esoibosa H. 207 ( MEXU) ; ¿ September 1933, Mexico City, Serrania de Guadalupe (D. F.), E. Lyonnet 1137 ( MEXU) ; 10August 1970, Vertiente NW del Cerro Chiquihuite, cerca de Cuautepec , Rzedowski 27418 ( CAS, ENCB, NY) ; 30 June 1973, Sierra de Guadalupe, Cerro Grande , 5 km al NNW de Cuautepec, S. Moreno G. 261 ( CAS, ENCB, MEXU, NY) ; September 1952, Sierra de Guadalupe, al N de la Ciudad de México, L. Paray 552 ( IEB) . MICHOACÁN: 5 August 1986, Morelia —aprox. 2 km al Noroeste de La Concepción, V. M. Herta B. 557 ( MEXU) . MORELOS: 28-III1981, Totolapan —Cerro Villa Nicolas Zapata G. Ayala 74 ( MEXU) ; OAXACA: 24 June 1997, San Miguel Tlacotepec —A 3.9 km de San Miguel Tlacotepec, desviación hacia Yosondaya. Distrito Juxtlahuaca, Región Mixteca, J.I.Calzada 22005 ( MEXU) ; 12September1894, Between Coixtlahuaca &Tamazulapam, 2134 –2347 m, E. W. Nelson 1940 ( NY) ; 17 June 1979, Concepción Buenavista, M. Sousa 10361 ( MEXU, NY) ; 8 July 1986, Aprox. 2 km al O de El Rodeo, A. Salinas T. F3342, D. Frame, P. Tenorio, A. García, E. López, E. López ( MEXU, NY) ; 11 September 1968, Cerro Jicote , al W de Jicotlán, R. Cruz Cisneros 2220 ( CAS, ENCB, NY) ; 4 May 1992, Santa Catarina Zapoquila — Cerro Yolotepec , SO de Guadalupe Membrillos. Distrito Huajuapam, Región Mixteca, P. Tenorio L. 18269 ( CAS, MEXU) ; 19 June 1986, Along Hwy 125 between Teposcolula and Tlaxiaco , 33.5 km S of junction with Hwy 190, 22 km N of Tlaxiaco, C. M. Diggs Jr. 3868 ( MEXU, NY) ; 17 June 1979, Bajo El Molino, a 2 km. al E de Santiago Tejupán (Distr. de Teposcolula), A 5 km al N de Coixtlahuaca , M. Sousa S. 10348, 10359, L. Rico ( MEXU, NY) ; 18 July 1978, Along Hwy. 190, 3.2 mi, E of Tamazulapan, C. Dziekanowski 3114, D. Dunn, M. Pennell ( NY) ; 8 September 1990, San Pedro Nopala— Cerro Garabatal , SW de Valle Verde. Distrito Teposcolula, Región Mixteca, P. Tenorio L. 17066, A. Salinas, J. Sánchez-Kent ( MEXU, SD) ; 7 July 1981, 1 km al N de Tepescolula, sobre la vereda a San Andres, L, Distrito de Tepoescolula , Mixteca Alta, A. García M. 413 ( IEB) ; 6 July 1985, San Cristóbal Suchixtlahuaca — 2 km NE de San Cristóbal Suchixtlahuaca, terracería a San Juan Bautista Coixtlahuaca. Distrito Coixtlahuaca , Región Mixteca F. Chiang 2521 ( MEXU) ; 7 October 1985, Tepelmeme Villa de Morelos—Cerro Tequelite , N de Mahuizapan. Distrito Coixtlahuaca, Región Mixteca P. Tenorio L. 10763 ( MEXU) ; 26 July 1979, San Juan Bautista Coixtlahuaca — 2 km S de San Juan Bautista Coixtlahuaca. Distrito Coixtlahuaca , Región Mixteca F. Chiang 165 ( MEXU) ; 8 July 1976, San Juan Teposcolula—Cieneguilla, 4 km E de la desviación a Santa María Asunción Tlaxiaco. Distrito Teposcolula , Región Mixteca, A. S. Magallanes 123 ( MEXU) ; 6 July 1971, Entre Teopan y El Arroyo Garza, Distrito de Coixtlahuaca , M. Cabrera 55 ( ENCB) ; 20 August 1960, Highway at Puerto Herrera (km 420), just NW of Yanhuitlan 17.55, 17.55–97.42 2500 m, H. H. Iltis 1137, R. Koeppen, F. Iltis ( ENCB) ; 9 July 1969, 1.5 km al W de Magdalena Jicotlán, Distrito de Coixtlahuaca , R. Cruz C. 2377 ( ENCB) ; 24 September 1978, 7 km al SW de San Cristobal Suchixtlahuaca, Distrito Coixtlahuaca , M. Sousa 9783, S. Purata ( ENCB) ; 11 September 1968, Cerro Jicote , al W de Jicotlán, R. Cruz C.2220 ( ENCB) . PUEBLA: 3 October 1984, Caltepec, P. Tenorio L. 7566 ( MEXU) ; 16 July 1986, Xonacatlán , Mpio. Coyoaco, F. Ventura A. 22200 ( ENCB, MEXU) ; 21 September 1975, On W slope of Sierra Madre Oriental, 5 mi. NE of Chapulco; in watershed of Rio Salado , G. L. Webster 20060, S. Armbruster, G. Holstein ( MEXU, NY) ; 19 July 1984, La Barranca de los Membríllos, P. Tenorio L. 6695, C. Romero de T. ( IEB, MEXU, NY) ; 6 May 1983, El Zapote. Barranca de los Membrillos P. Tenorio L. 3829, R. Torres, C. Romero de T. ( MEXU, NY) ; 26 August 1971, Oriental , Mpio. Oriental, F. Ventura A. 4156 ( CAS, ENCB, IEB, MEXU) ; 11 April 1984, La Barranca de los Membríllos, P. Tenorio L. 5782 ( MEXU, NY) ; VIII-1907, In the vicinity of San Luis Tultitlanapa, Puebla , near Oaxaca, C. A. Purpus 2681 ( US) ; V-1908, Puebla, In the vicinity of San Luis Tultitlanapa, Puebla , near Oaxaca. Las Naranjas, Oaxaca, C. A. Purpus 3209 ( US) ; VII-1907, Vicinity of Puebla, State of Puebla. Acatzinco , district de Tepeaca, G. Arsene 2197 ( US) ; 12 August 1987, M. Tlapa 127, G. Ubierna ( IEB, MEXU) . SAN LUIS POTOSÍ: 1878, Chiefly in the region of San Luis Potosí, 1829–2438 m, C. G. Parry 168, E. Palmer ( US), Chiefly in the region of San Luis Potosí, 1829–2438 m, 169 ( NY, US). STATE OF MEXICO : 28 September 1969, 10 km N de Chalco , M. E. González 99 ( IEB) ; 5 June 1977, Zumpango—Cerro Xalpan , al N de San Juan Citlaltepec Rzedowski 34779 ( ENCB, MEXU) ; 31 July 1954, Saucingo, Texcoco , E. Matuda 31258 ( ENCB, MEXU) ; 2 August 1979, Texcoco—Cerro Tetzcutzingo , 7 km al E de Tezcoco, M. T. Pulido 99 ( ENCB, MEXU) ; 23 June 1966, 20 km al NE de Texcoco, Rzedowski 22450 ( CAS, ENCB, NY, TEX-LL) ; 16 September 1951, C. Tlaltihuacan, E. Matuda 21883 ( MEXU, NY) ; 20 July 1967, 8 km al E de Coatlinchán, Mpio. Texcoco, Rzedowski 24052 ( CAS, ENCB) ; 9 June 1968, 20 km al NE de Texcoco , km 61 de la carretera a Calpulalpan, R. Cruz Cisneros 1852 ( CAS, ENCB, SD) ; 5 November 1975, Axapusco, Cerro de Jaltepec , A. Ventura A. 523 ( CAS, ENCB, MEXU) ; 18 August 1974, 3 km al W de San Cristóbal Ecatepec ; base de la Sierra de Guadalupe, Rzedowski 32136 ( CAS, ENCB, MEXU, NY) ; 10 September 1982, Texcoco — Tepetlaostoc, E. Ventura V. 10 ( ENCB, IBUG, MEXU) ; 12 June 1981, Cerro Gordo , Mpio. Otumba, M. Castilla 1271 , D. Tejero ( ENCB, IEB) ; 9 March 1980, Cerro Gordo, S. M. Pirámides, Castilla 647, Tejero ( ENCB, IEB) ; 27 August 1983, Texcoco —San Nicolas Tlamincas E. Ventura V. 1150 ( IEB, MEXU) ; July 1954, Camino Texcoco-Huamantla, E. Lyonnet 540700001 ( IEB, MEXU) ; 6 July 1975, Ranchería Buenavista , 8 km al E de San marcos, Mpio. Otumba, C. Fuentes M. AI-7 ( ENCB) ; 30 September 2014, Paraje Huahualtepec, Santiago Tapaicatlalpan , Xochimilco, A. Patlán 91, C. Martínez ( ENCB) ; 20 June 2015, Paraje Tepepa, Santiago, Tepaicatlalpna , Xochimilco, A. Patlán 235, C. Martínez ( ENCB) ; 30 August 1980, Cerro Gordo, S. J. Teotihuacán , Cerro Verde, Temascalapa, M. Castilla 800, D. Tejero ( ENCB) ; not date, 3 km al N de Cuautepec , ladera andesítica, N. Vázquez 61 ( ENCB) ; 9 June 1968, 20 km al NE de Texcoco, km 61.5 carrt. México-Veracruz, vía Apizaco , A Pineda R. 272 ( ENCB) ; 9 June 1968, Km 61.5 de la carretera México-Veracruz, vía Apizaco , 20 km al NE de Texcoco, L. Rodríguez J. 16 ( ENCB) ; 24 September 1983, Estación Expermiental Zoquiapan, Mpio. Chalco , Ortíz B. L. s.n., ( ENCB) ; 24 Septemebr 1983, Estación Experimental Zoquiapan , cerca de Llano Grande, Mpio. Chalco, L. Ortiz B. s.n. ( ENCB) . TLAXCALA: 3 November 1964, 15 miles east of Calpulalapan , H. D. Ripley 13632, R. C. Barneby ( NY) ; 10 July 1992, Mpio. Tlaxco , 9 km al NNE de Capula, sobre la desviación Estación Mena- Emiuliano Zapata, J. Santana C. 407 ( IEB) , A. Martínez B., S. Camargo R., M. Flores C. ( IEB) ; 19 July 1980, Tlaxco, H. Vibrans s.n. ( IEB) ; 30 June 1990, Españita —“El Potrero”, entronque carretera Españita-Méx., Veracruz, R. Ramírez 242 ( MEXU) ; 9 July 1967, 4 km al W de Apizaco , E. Ruiz B. 38 ( ENCB) .

Figures

FIGURE 26. Map showing the distribution of Astragalus strigulosus, A. tephrodes, A. thurberi, A. tijuanensis, and A. tioides in Mexico.