Swartzia longicarpa Amshoff
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Authority
Cowan, Richard S. 1967. Swartzia (Leguminosae, Caesalpinioideae Swartzieae). Fl. Neotrop. Monogr. 1: 3-228. (Published by NYBG Press)
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Family
Fabaceae
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Scientific Name
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Type
Type collection. G. Stahel 137 (holotype U; isotype NY), upper Suriname R. near Goddo, Suriname, Jan. 1926.
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Description
Description - Tree 9-12 m tall, the trunk 15-19 cm diameter, the branchlets densely dark-brown pilosulose; stipules caducous, 8-9.5 mm long, 1.5-2 mm wide, oblong-lanceolate, acuminate, slightly falcate, strigulose externally, glabrous within; petioles canaliculate, the ridges terminating in stipels to 1 mm long, pilosulose, 1-2 cm long, the rachis 7.5-11.5 cm long, narrowly alate, the wings terminating in mucronate stipels at each juga, pilosulose except for the glabrous wing; leaves 11-13-foliolate, the leaflets opposite to alternate, the petiolules ca 1 mm long, pilosulose, the blades of the 2-4 lowermost leaflets ovate to elliptic-ovate, 2.5-3.5 (-6.5) cm long, 1.5 cm wide, the blades of the remaining leaflets lanceolate to elliptic, 4.5-8.5 cm long, 1.5-2.5 cm wide, the base of all the leaflets rounded-obtuse except the basally acute terminal leaflet, the apex acute to acuminate, mucronulate, the upper surface glabrous, excepting the pilosulose costa, pilose beneath, especially on the venation, the costa impressed above but the primary veins plane, both costa and primary veins salient beneath; inflorescence racemose, ramigerous, 40.545 cm long, the axis minutely strigulose, the bracts deciduous to persistent, broadly ovate, ca 1.7 mm long and 1.4 mm wide, minutely strigulose externally, glabrous within, the bracteoles persistent or deciduous, ovate, arising ca % of the distance from the pedicel base, less than 1 mm long, minutely strigulose externally, glabrous within; pedicels flattened-clavate, 25-40 mm long, to 6 mm broad apically, minutely strigulose, the buds elliptic to globose in outline, 14-15 mm long, 8-15 mm diameter, sometimes hardly distinguishable basally from the pedicel apex, minutely strigulose; calyx segments 4, thick, woody, minutely strigulose externally, glabrous within; petal villose-sericeous externally, glabrous within, the claw 6 mm long, the blade ovate, strongly cordate basally, 34-45 mm long, 30-45 mm wide; larger stamens 10-18, glabrous, the filaments ca 25 mm long, the anthers oblong, ca 2.5 mm long and 1 mm wide, the smaller stamens glabrous, the filaments 15 mm long; style elongate, glabrous except basally sericeous; ovary linear, 18-20 mm long, 2 mm wide, sericeous; gynophore 4-6 mm long, sericeous; fruit moniliform, 2-12-seeded, to 20.5 cm long, 1.5-2 cm wide, minutely strigulose, the stipe 15-20 mm long; seeds shiny, brown.
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Discussion
Amshoff was quite correct in relating the species to S. ingifolia and to S. laxiflora; from both it differs in its clavate to globose buds which are strongly rugose longitudinally. The flattened-clavate pedicels are also distinctive. The leaves are similar to those of S. piarensis, which has a glabrous gynoecium and strictly globose buds.
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Distribution
(Fig. 3). Known only from the forest in the near-interior of Suriname.
Suriname South America|