Name
Acaciella chamelensis (L. Rico) L. Rico
Rico Arce & BachmanAnales del Jardín Botánico de MadridVol. 63(2): 189-244July-December 2006
Synonymy and types
Acacia chamelensis L. Rico, Kew Mag. 10(2): 66. 1993, basion. Type: México; Jalisco, Municipio La Huerta, Estación de Biología Chamela, 19º 30' N, 105º 03' W, 4 Feb. 1983, A.S. Magallanes 3987 (holotype, MEXU!).
Formal description
Shrub up to 6 m tall, yellowish-hirsute. Stipules filiform, 7 mm long, pubescent, long-ciliate, fugacious. Leaves up to 15 cm long; petiole 3-6.5 cm long, channelled, hirsute or strigulose; rachis up to 8.5 cm long, channelled, hirsute or strigulose, with 2-4 pairs of pinnae; pinnae 6-8.5 cm long; paraphyllidia 1-1.5 mm long; leaflets 6-10 pairs per pinna, 8-22 × 4-7 mm, elliptic, base and apex acute, venation brochidodromous, glabrous or slightly pubescent above, margin ciliate, chartaceous. Inflorescence consisting of clusters of 2-4 capitulum-like racemes on a main axis to 20 cm long, hirsute; peduncles 1-1.5 cm long; glabrous, without pearl glands; inflorescence bracts filiform, fugacious, ciliate, one at base of peduncle, 6-7 mm long, another about mid-way up or closer to the raceme, 2 mm long; floral bract c. 1.5 mm long, glabrous, clavate, fugacious; pedicels 1-1.5 mm long, glabrous; flowers white, becoming orange when dry; racemes up to 17 mm long at anthesis. Calyx 1-1.3 mm long, 5- lobed, the lobes less than ¼ the length of the whole calyx, glabrous. Corolla c. 2.5 mm long, 5-lobed, the lobes to more than half the whole corolla length, glabrous. Stamens 4.5 mm long. Ovary 1 mm long, glabrous, short-stipitate, the stipe 0.5 mm long; basal nectary 0.75 mm high. Legume 4.5-5 × 1.5-1.8 × 0.3 cm, flat, straight, valves chartaceous, conspicuously reticulate-veined, glabrous, rounded at the base, acute at the apex; stipe not seen complete; beak present, 3 mm long. Seeds 6-8 per fruit, only seen immature.
Distribution
Mexico: Jalisco and Colima.
Additional info
Habitat. Low deciduous forest with seasonal rains during July and September.
Flowering time
Flowering in February and September, fruiting in November.
Representative specimens
MEXICO:
Colima:
- Cuyutlán, Laguna de, 19º 00' N, 104º 10' W, 2-IX-1979, Magallanes, J.A.S. 1831 (CAS, K, MEXU, MO, MSC, NY).
Jalisco:
- eje central cruce con camino antiguo, Estación Chamela, 19º 32' N, 105º 05' W, 4-II-1983, Magallanes, J.A.S. 3987 (MEXU);
- eje central cruce con camino antiguo, Estación de Investigación, 19º 31' N, 105º 05' W, 11 m, 4-II-1983, Rodríguez B., D. 3987 (MEXU).