Name
Acaciella sotoi L. Rico
Rico Arce & BachmanAnales del Jardín Botánico de MadridVol. 63(2): 189-244July-December 2006
Synonymy and types
Type: Mexico: Michoacán; Mun. Aquila, 7 km NO de la Placita, 20 Oct. 1985, J.C. Soto 11203 (holotype, MEXU!; isotypes, BM!, K!, MO!).
Formal description
Shrub to 2 m tall, twigs and stems hirtellous-pilose. Stipules to 10 mm long, c. 1 mm wide, fugacious. Leaves 11-16 cm long; petiole to 3 cm long; rachis 3-7 cm long, with hirtellous and sericeous hairs; with 3-4 pairs of pinnae; pinnae 3-9 cm long; paraphyllidia 1 mm long, fugacious; leaflets 5-7 pairs per pinna, 1.2- 2.8 × 0.7-1.5 cm, ovate-rhombic, base and apex acute, brochidodromous venation evident on both surfaces, but more so on the lower surface, puberulous above, sericeous on the lower surface, coriaceous. Racemes in terminal panicles, less frequently in axillary fascicles, main rachis 10-15 cm long, with hirtellous and sericeous hairs; peduncles 1-1.5 cm long, sericeous, without pearl glands; 2 inflorescence bracts at the peduncle base, these 8 mm long, linear-triangular, pilose, fugacious, another bract about half way up the peduncle, 1 mm long, sericeous; floral bract 0.7 mm long, with sparse strigose and pilose hairs, clavate, fugacious, very conspicuous when the inflorescence is immature; pedicels 1 mm long, glabrous; flowers white, when dry orange, in short racemes, 12-14 mm in diam. at anthesis. Calyx 0.75 mm long, 5-lobed, the lobes less than ¼ the length of the whole calyx, calyx almost truncate, sericeous. Corolla 2-2.5 mm long, 5- lobed, the lobes to more than half the whole corolla length, sericeous. Stamens 4 mm long. Ovary 0.75 mm long, glabrous, short-stipitate, the stipe shorter than the ovary, c. 0.5 mm long; basal nectary 0.25 mm high. Legume densely villose-pubescent, stipitate. Seeds not seen.
Distribution
Mexico: Michoacan endemic.
Additional info
Habitat. Medium stature deciduous forest (trees above 20 m tall, but less than 35 m). Alt. 60 m.
Flowering time
Flowering in October; immature fruits in October.
Representative specimens
MEXICO:
Michoacán:
- a 7 km al NW de La Placita, municipio de Aquila, 18º 36' N, 103º 30' W, 60 m, 20-X-1985, Soto, J.C. 11203 (BM, K, MEXU, MO).