Name
Acaciella painteri var. houghii (Britton & Rose) L. Rico
Rico Arce & BachmanAnales del Jardín Botánico de MadridVol. 63(2): 189-244July-December 2006
Synonymy and types
Acaciella houghii Britton & Rose, N. Amer. Fl. 23: 103. 1928. basion. Type: Mexico: Morelos, near Cuernavaca [18º 55'N, 99º 15'W], J.N. Rose & Walter Hough 4367 (holotype, NY!; isotype, US!).
Acaciella submontana Britton & Rose, N. Amer. Fl. 23: 103. 1928. Type: Mexico: Nayarit, Mpio. Tepic, near San Blasito [20º 40'N, 104º 16'W], 4 Aug. 1897, J.N. Rose 3345 (holotype, NY!; isotype, US).
Formal description
Shrub to 5 m tall, glabrous, occasionally pubescent on very young stems. Stipules linear to lanceolate, 3- 3.5(4) mm long, with long erect hairs, fugacious. Leaves 8.5-10(12) cm long; petiole 2-2.5 cm long, slightly channelled, glabrous or glabrescent; rachis 1- 3 cm long, glabrescent, with 3-8 pairs of pinnae; pinnae 4-5.5 cm long; paraphyllidia c. 1 mm long; leaflets (16)34-40 pairs per pinna, 4.5-7(12) × 1.5-2(3) mm, linear-oblong, base oblique, apex rounded to acute, venation brochidodromous, usually glabrous, sometimes slightly pubescent on the base of the midvein, margin very short-ciliate, membranaceous. Inflorescences consisting of clusters 2-3, racemes axillary or terminal, usually on a main axis 8.5-20 cm long, glabrescent; peduncles 0.7-1 cm long; glabrous or glabrescent, without pearl glands; inflorescence bracts 1 or 2, up to 2 mm long, one at the middle of the peduncle, the other very near to the raceme, pubescent, linear, fugacious; floral bract 0.5 mm long, pubescent, clavate, fugacious; pedicels 0.7-1 mm long, glabrous; flowers white, becoming orange when dry; racemes 0.7-1(2.2) cm long at anthesis. Legume (3.7)4 × 0.7 × 0.2 cm, flat, straight, dehiscent; valves membranaceous, conspicuously reticulate, glabrous, acute at the base and apex; stipe 0.6 mm long; beak present, 2 mm long. Seeds 3-3.5 × 3-3.3 × 2.1-2.3 mm.
Distribution
Mexico: Chiapas, Colima, Durango, Guerrero, Jalisco, Edo. Mexico, Michoacan, Morelos, Nayarit, Puebla, Sinaloa and Sonora.
Additional info
Habitat. Seasonally dry forest, dry scrubland, scrub, Quercus and mixed Quercus-Pine forest and less frequently in humid mesophyllous forest; on sandy soils, but prefers limestone. Alt. 50-1950 m.
Key to varieties of Acaciella painteri 1. Twigs, rachises and petioles with short, sparse strigulose hairs, sometimes hirsute, but not yellow-hirsute; restricted to Jalisco and Nayarit states in SW Mexico ... var. painteri 1. Twigs glabrous or very sparsely puberulous; plants with a wider distribution in Central and Southwest Mexico ... var. houghii
Flowering time
Flowering all year, fruiting from August- March.
Representative specimens
MEXICO:
Colima:
- Manzanillo, 19º 02' N, 104º 19' W, 26-XI- 1981, Magallanes, J.A.S. 3329 (MEXU);
- Steep bluffs above Rio Salado, 5 miles S of Colima, 19º 13' N, 103º 42' W, 400 m, 17-VII- 1957, McVaugh 15505 (MEXU);
- Rancho el Jabali, approx. 20 km N de la Cd. de Colima, cerca de la Hacienda San Antonio, 19º 26' N, 103º 40' W, 1300 m, 7-II-1992, Rico, L. 949 (K, MEXU).
Durango:
- cañón río Mezquital, Camino entre Temoaya y La Candelaria, 23º 11' 09'' N, 104º 35' W, 1100 m, 6-X-1999, González, M. 3146 (CIIDIR, K).
Guerrero:
- Potreritos, 3,7 km al E, 18º 12' 45'' N, 101º 27'37'' W, 1240 m, 29-I-2000, Calonico S., J. 20926 (MEXU);
- 3 km adelante del poblado de Alcozauca, 1310 m, 4-XII- 1989, Calzada, J.I. 15111 (MEXU).
Jalisco:
- Bolaños, En la Zuluaga, 8 km al W de San Martín Bolaños, 21º 14' N, 104º 08' W, 1500 m, 21-VIII-1988, Flores M., A. 1076 (IBUG, MEXU);
- Huentitán Bajo, Barranca de Huentitán, 20º 45' N, 103º 19' W, 1300 m, 3-XI- 1990, Flores M., A. 2525 (XAL);
- Rancho Cuixmala, Saddle on road between Cumbres 1 and Cumbres 2, 19º 26' N, 104º 58' W, 20- VIII-1991, Lott, E.J. 3814 (K, MEXU);
- La Flor del Campo, Mpio. de Mazanitla, 2000 m,-VIII-1978, Pérez Calix, E. 28 (IEB). México. Temascaltepec, La Chorrera, 19º 02' N, 100º 03' W, 1350 m, 20-XII-1933, Hinton, G. B. 5367 (K);
- Limones, 18º 49' N, 100º 17' W, 960 m, 22-XII-1933, Hinton, G. B. 5377 (K, LL).
Michoacán:
- a 12 km SW de Tuzantla por carr. a Tiquicheo, entre Puente el Pedregal y Las Juntas, 19º 00' N, 100º 40' W, 600 m, 20-VII-1983, Hernández H.M. 173 (MO);
- 13 km al S de Arteaga y a 13 km N de Taguazal, 18º 28' N, 102º 25' W, 23-X-1977, Ladd M. 324 (MEXU);
- 5 km al SW de Ario de Rosales, 19º 12' N, 101º 43' W, 1650 m, 11-IX-1979, Soto, J.C. 1540 (MEXU).
Morelos:
- Carr. Cuernavaca-Yautepec " Cañón de Lobos", 18º 53' N, 99º 04' W, 1420 m, 2-XII-1982, Dorado, O. 1089 (K, MEXU);
- 2 km al S de Tlayca, Mpio. Jonacatepec, 18º 42' N, 98º 50' W, 1300 m, 18-X- 1986, Flores F., G. 289 (MEXU).
Nayarit:
- 2,8 km al NW de Jesús María, camino a Mesa del Nayar, 22º 15' N, 104º 33' W, 970 m, 23- IX-1989, Flores F., G. 1279 (MEXU).
Puebla:
- Izúcar de Matamoros, 18º 36' N, 98º 28' W, 5-IX-1966, Boege, W. 346 (MEXU);
- Paraje Las Trojas, 5 km de El Sábalo, 1200 m, 1-XI- 1985, Vidana, J.M. 60 (IBUG, IEB).
Sinaloa:
- La Cebolla + 40 km al N de San Ignacio, 25º 25' N, 106º 09' W, 1500 m, 20-VIII-1980, Avina, R.V. 826 (MEXU);
- On the road from Esquinapa de Hidalgo to Acaponeta on the first rise of small hills 10 km to the south of Esquinapa, 22º 44' N, 105º 30' W, 10 m, 15-XI- 1991, Macqueen, D.J. 222 (EAP, FHO, K, MEXU).
Sonora:
- Guaymas, 27º 56' N, 110º 54' W, 11-X-1887, Palmer, E. 254 (BM);
- Cañada Verde, 19 km al E de Agua Caliente, 30º 57' N, 110º 51' W, 1050 m, 6-X-1985, Tenorio, P. 10243 (MEXU, TEX). Zacatecas. Santa Rosa, Cerro de la Cruz, Cañón de Juchipila, 5-VIII-1992, Enríquez E., E. 91 (MEXU).