Swartzia jorori Harms
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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. T. Herzog 1370 (lectotype G; isolectotypes F, S, W), Rio Pirai, Depto. Santa Cruz, Prov. Sara, Bolivia, Jan. 1911. Several collections were cited by Harms in the original publication but only this one has been seen; it appears likely that the others may have been destroyed at Berlin in the World War II fire. Since it is only in bud, this is not an altogether satisfactory lectotype but there appears no other choice at the moment.
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Description
Description - Shrub to tree 2-15 m tall, the branchlets minutely puberulous; stipules persistent, triangular, 0.8-1.5 mm long and wide, glabrous or at first minutely puberulous externally but soon glabrescent; petioles terete, (8-)12-20(-30) mm long, sparingly micropuberulous but soon glabrescent; rachis (1 -)3-6.5(-8.5) cm long, terete, sparingly puberulous, sometimes glabrescent; leaflets (1-) 2- or 3-jugate, the petiolules 1.5-3 mm long, minutely puberulous, sometimes glabrescent, the blades oval or ovate to suborbicular or narrowly elliptic, those of the lowermost pair smaller, 2-4.5 cm long, 1.5-2.5 cm wide, the blades of the other pairs 4-11 cm long, 2-5 cm wide, the base of all the leaflets rounded and obtuse or acute to attenuate and acute, the apex rounded to bluntly acute or acute, the blades glabrous except for the minutely puberulous costa on both the upper and lower surfaces, the costa and primary veins plane on the upper surface, more or less salient beneath; inflorescence axillary to ramuliflorous, several fasciculate, sometimes with a racemose branch, 4-8 cm long, the axis minutely strigulose, the bracts deciduous to persistent, 1-1.5 mm long, 0.4-0.5 mm wide, narrowly triangular, minutely strigulose externally, glabrous within; bracteoles lacking; pedicels 2-4.5 mm long, minutely strigulose; buds elliptic to oval in outline, apiculate, 3.5-5 mm long, 3-3.5 mm diameter, sparingly strigulose minutely; calyx segments 3 or 4, submembranaceous, minutely strigulose sparingly on the outer surface, glabrous within; petal yellow, glabrous, the claw ca 1-1.5 mm long, the blade oblanceolate to obovate, acute basally, 8-10.5 mm long, 5-7.5 mm wide; larger stamens 2 or 3, glabrous, the filaments 5-7.5 mm long, the anthers elliptic, 1-1.5 mm long, 0.5-0.7 mm wide, the pollen globose, 21-26 ii diameter, the smaller stamens 20-22, glabrous, the filaments 2.5-3.5 mm long, the pollen globose, ca 21 µ diameter; gynoecium glabrous, the stigma truncate to capitellate, the style ca 2-3 mm long, strongly curved to coiled, the ovary narrowly elliptic, 3.5-4.5 mm long, 1-1.5 mm wide, the gynophore 1-1.5 mm long; fruit elliptic in outline, more or less cylindric, 27-47 mm long, 18-22 mm diameter, glabrous, 1- or 2-seeded, the stipe 2 mm long.
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Discussion
This is one of the most distinctive species of the genus and it does not have obvious affinities with any species other than S. pittieri of southwestern Venezuela which is at once separable by the 2-parted calyx and a style proportionately much shorter and not uncinate or coiled. Both S. jorori and S. pittieri are quite similar to S. cubensis of western Cuba and Central America with respect to the inflorescence and flowers, but the last has apetalous flowers.
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Common Names
Jorori
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Distribution
Savanna forest along the rivers in northern and southeastern Bolivia, 250-500 m alt.
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