Name
Acaciella tequilana (S. Watson) Britton & Rose var. tequilana
Rico Arce & BachmanAnales del Jardín Botánico de MadridVol. 63(2): 189-244July-December 2006
Synonymy and types
Acacia penicillata Standl., Contr. U.S. Natl. Herb. 20: 185. 1919. Acaciella penicillata (Standl.) Britton & Rose, N. Amer. Fl. 23: 104. 1828. Type: Mexico: Oaxaca, Cerro San Felipe, C. Conzattii & V. González 564 (lectotype, designated here, US!; isolectotypes, GH!, MEXU!). Acacia laevis Standl., Contr. U.S. Natl. Herb. 20: 185. 1919. Acaciella laevis (Standl.) Britton & Rose, N. Amer. Fl. 23: 104. 1928. Type: Mexico: Jalisco, near Guadalajara, C.G. Pringle 11354 (lectotype, designated here, US!; isolectotypes, MEXU!, NY!).
Formal description
Perennial herb or shrub up to 3 m tall, glabrous, glaucous. Stipules to 4 mm long, fugacious. Leaves 9-27(36) cm long; petiole up to 5 cm long, terete, glabrous; rachis (3)8-16(18.5) cm long, glabrous, with (2)3-8 pairs of pinnae; pinnae (2.5)4-13 cm long; paraphyllidia 1.5 mm long; leaflets (6)14-30 pairs per pinna, (3)12-15 (20) × 3-8(17) mm, elliptic to widely elliptic, base oblique, apex rounded, brochidodromous venation well marked on both surfaces, glabrous, slightly chartaceous. Inflorescences usually open terminal panicles, with main rachis 20-55 cm long, glabrous; peduncles (1.5)2.5-3.5(4.5) cm long; glabrous, without pearl glands; inflorescence bracts 1-2 at the peduncle base, 3.5 mm long, glabrous, naviculiform, fugacious; flowers white, orange when dry, in short capitulum- like racemes, 15-18(20) mm in diam. at anthesis; floral bract c. 2 mm long, glabrous, fugacious; pedicels 1-2 mm long, glabrous. Calyx 0.7 mm long, almost truncate, glabrous. Corolla 3 mm long, 5-lobed, the lobes to more than half the whole corolla length, glabrous. Stamens 6 mm long. Ovary 2 mm long, glabrous, short-stipitate, the stipe shorter than the ovary; basal nectary 1 mm high. Legume 5.3-8.5 × 0.7-1.3 × 0.3 cm, flat, straight; valves chartaceous, conspicuously reticulate- veined, glabrous, acute at the base and apex; stipe 1.8 cm long; beak absent. Seeds 6-7 per fruit, elliptic to widely elliptic in outline, spherical, 3- 4.5 × 3.5-4.5 × 1-2 mm.
Distribution
Mexico north and central; from Chihuahua and Durango to Oaxaca and Puebla.
Additional info
Habitat. Quercus and Pinus forest, dry scrub with Cactaceae. Alt. 900-2500 m.
Vernacular names and uses. Guasillo, timbre; the roots are used for tanning.
Flowering time
Flowering from August to November, fruiting from September to December.
Representative specimens
MEXICO:
- Rincón del Cañón, Hinton, G.B. 5406 (G).
Chihuahua:
- Balleza, 26º 57' N, 106º 21' W,-IX-1977, Enríquez Andrés 194 (NY). Durango:
- Reserva de la Biosfera La Michilia, Arroyo El Taray, 23º 25' 59'' N, 104º 14'16'' W, 2400 m, 28-VIII-1995, García, A. 2038 (CIIDIR, K);
- al N de Tuitán, municipio del Nombre de Dios, 24º 02' N, 104º 15' W, 19-IX-1981, González, S. 2018 (IEB).
Guanajuato:
- Penjamo, 12 km al N de Tierras Negras, 20º 23' N, 101º 42' W, 2200 m, 18-XI- 1991, Rzedowski 51310 (IEB).
Guerrero:
- Tlacotepec, 11.4 km al S de camino a Verde Rico, 17º 41' N, 99º 56' W, 1180 m, 5-X-1998, Cruz Durán, R. 3018 (MEXU);
- Rio, Sierra Madre del Sur, north of Rio Balsas, Cerro de la Guacamaya, Temisco, 17º 06' N, 99º 04' W, 18-XI- 1937, Mexia, I. 8850 (K, NY).
Hidalgo:
- Metzquititlán, Barranca de Venados, 20º 42' N, 98º 56' W, 1800 m, 6-VIII-1979, Hernández M., R. 3584A (MEXU).
Jalisco:
- 20 al W de Guadalajara, Bosque de la Primavera, 20º 43' N, 103º 33' W, 1600 m,-VII-1977, Alonso, G. s.n. (IBUG);
- km 10 de la carr. que va de Tesistán a San Cristóbal de la Barranca, 20º 14' N, 103º 25' W, 1500 m, 22-VII-1990, Chazaro B., M. 6306 (IEB, MEXU).
México:
- Temascaltepec, 19º 02' N, 100º 03' W, 29-IX- 1933, Hinton, G. B. 4852 (BM, MO, NY);
- San Pedro y Palmar Grande, 18º 34' N, 100º 24' W, 500 m, 26-XI- 1954, Matuda 32071 (MEXU).
Nayarit:
- 4 km al SE de Santa María del Oro, 21º 20' N, 104º 35' W, 900 m, 7-XI- 1993, Rico, L. 2001 (MEXU);
- 3 km al SE de El Refugio, camino a Guadalajara, Mpio. Tepic, 21º 24' N, 104º 53' W, 6-IX-1985, Téllez, O. 9010 (IBUG, K, MEXU).
Oaxaca:
- Cerro San Felipe, Conzatti 564 (GH, MEXU, US);
- Nueve Puntas, estacion de microondas, a 7 km al SE de Matatlán, 16º 50' N, 96º 20' W, 2050 m, 17-IX-1978, Sousa, M. 9399 (BM).
Puebla:
- Hacienda Noria, Río Atoyac, 19º 18' N, 97º 24' W, 25-VII-1925, Antonio, Hno. s.n. (MEXU);
- Atoyac, Río, 18º 25' N, 97º 11' W, 15-VII-1910, Nicolás Hno. s.n. (K).
Querétaro:
- 4-8 km NE de Bucareli (NW 21 99), 21º 03' N, 99º 37' W, 1300 m, 18-XII-1978, Zamudio, S. 3612 (IEB).
San Luis Potosí:
- Las Canoas, 21º 57' N, 99º 32' W, 17-X- 1891, Pringle 3916 (BM, NY).
Tamaulipas:
- Tampico, La Laguna de Chaivel, 22º 13' N, 97º 51' W, 5 m, 14-IX-1967, Rzedowski 45956 (ENCB).
Zacatecas:
- Sierra de Morones, cerro Piñones, 2 km al W de rancho de Jesús Ayala, 21º 12' 24'' N, 103º 13'11'' W, 2000 m, 14-IX-1999, Balleza C., J.J. 10949 (MEXU).