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(Last Modified On 3/6/2013)
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(Last Modified On 3/6/2013)
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Species
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MACHAERIUM BIOVULATUM Micheli
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PlaceOfPublication
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Mem. Soc. Phys. Hist. Nat. Geneve 34: 265, pl. 15. 1903.
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Synonym
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Machaerium acanthothrysus Pittier, Contr. U. S. Nat. Herb. 20: 473. 1922.
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Description
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Shrub or tree. Leaves with 9-18 leaflets, these equilateral, oblong, obovate-ob- long, 2.5-8 cm. long, 1.4-2.5 cm. wide, deltoid or rounded, often emarginate, thinly coriaceous, concolor, glabrescent to moderately villulose above and below; petioles 2-4 mm. long, the rachises up to 16 cm. long; stipules erect or deflexed, up to 8 mm. long, very variable in texture and pubescence. Panicles terminal and up to 20 cm. long, or shorter and axillary, or disposed as several short (up to 2 cm. long) racemes in the axils, the rachis and branches aurous-puberulent, the flowers dense, subsessile or with the pedicels about 2 mm. long; bracteoles suborbicular, 1.3-3 mm. long, aurous-villulose. Flowers with the hypanthium up to 5.5 mm. long, aurous- puberulent, the upper teeth evanescent, the lower broadly deltoid, 0.3-1 mm. long; vexillum erect, suborbicular 8-9 mm. long, often with 2 linear callosities below the middle, aurous-villulose; wing petals falcately oblong, 8-12 mm. long, the auricle rounded, the claw curved, sparsely villose; carinal petals falcately subrotund, 7-10 mm. long, sparsely aurous-piloise; stamens monadelphous, the sheath about 7 mm. long, the filaments upright, 3-4.7 mm. long; ovary long-stipitate, falcate, densely aurous-villose, 1-ovulate, the style 3.5-4 mm. long, pubescent beneath. Fruits stipitate for 3-9 mm., the seminiferous area falcately oblong, 2.2-5 cm. long, about 1 cm. wide, tuberculate, the soft elongate hairs mixed with bulbous-based trichomes, the wing occasionally subhemispherical, up to 6 cm. long, obtuse, the upper margin straight, the lower curved.
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Distribution
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Mexico and Central America.
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Specimen
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CANAL ZONE: Las Cascadas Plantation, Summit, Standley 29958. COCLE: half mile below the village of El Valle, Dwyer 1806. PANAMA: Rio Mamoni, Duke 5679.
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Note
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An excellent plate (tab. 15) accompanies Micheli's original description. All pistils dissected proved to be 1-ovulate, thus calling into question the appropriate- ness of Micheli's specific epithet. The flowers are purple, tinged with pink, with the vexillum with a green spot within.
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