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Name

Acaciella chamelensis (L. Rico) L. Rico

Rico Arce & Bachman
Anales del Jardín Botánico de Madrid
Vol. 63(2): 189-244
July-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 pinnaepinnae 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, glabrousclavate, 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 calyxglabrous. 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:

Jalisco:

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