Macrolobium montanum Ducke

• Authority

  Cowan, Richard S. 1953. A taxonomic revision of the genus Macrolobium (Leguminosae-Caesalpinioideae). Mem. New York Bot. Gard. 8 (1): 257-342.

• Family

  Caesalpiniaceae

• Scientific Name

  Macrolobium montanum Ducke

• Description

  
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  Species Description - Small shrub 1-1.5 m. tall or small tree 10-13 m. tall, the branchlets glabrous, or minutely puberulous but then glabrescent. Petioles 7-13 mm. long, glabrous. Leaf blades 2-3-jugate, the pairs 7-17 mm. apart; rachis 8-32 mm. long, glabrous. Leaflets 17-32 mm. long, 10-25 mm. wide, oval to suborbicular or oblong to obovate, the base inequilateral, the upper side cordate, the lower rotund-obtuse or acute, the apex rotund, retuse to emarginate; glabrous, or very sparsely puberulous on the costa above; costa salient, plane or slightly impressed on the upper surface, salient beneath, the venules obscure on the upper surface, prominulous beneath. Inflorescence 4-9 cm. long, the axis minutely puberulous, the peduncle 1.5-9 mm. long; bracts 1-1.5 mm. long, 1-1.5 mm. wide, triangular, glabrous within, glabrous or pilosulose externally; pedicels 4-7 mm. long, minutely puberulous or glabrous; bracteoles 5.5-8 mm. long, 3-3.5 mm. wide, elliptic, pilosulose within, minutely puberulous or glabrous outside. Hypanthium 1.5-2 mm. long, glabrous, subsessile. Sepals five, 2.5-3.5 mm. long, 1-1.5 mm. wide, the adaxial pair nearly completely united, triangular-lanceolate, acute, the other sepals oblonglanceolate, lanceolate or elliptic, bluntly acute to acuminate, ciliolate apically. Petal blade 3-4 mm. long, 4-5 mm. wide, more or less transversely oval, the claw 2.5-6 mm. long, auriculate, ciliolate basally, glabrous externally, villosulose within. Filaments 11-21 mm. long, villosulose basally or glabrous. Stigma simple or capitellate. Style 8.5-10.5 mm. long, glabrous. Ovary 2-2.5 mm. long, 1 mm. wide, oblong or linear, glabrous, 2-4-ovulate; gynophore 1.5-3.5 mm. long, puberulous or glabrous, inserted at the top of the adaxial hypanthial wall. Fruit 5.5-10 cm. long, 2.5-3 cm. wide, oblong-oblanceolate, glabrous, the carpophores 8-14 mm. long, glabrous. Seed 1-3 per fruit, about 1.5 cm. in diameter, suborbicular, the testa membranous, reddish-brown, smooth.

• Discussion

  Figure 7