Swartzia longipedicellata Sandwith
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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. A. W. Davis 456 (F. D. No. 2451, holotype K), Karaba Creek, Demerara R., ca 110 mi S of Georgetown, Guyana.
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Description
Description - Tree to ca 12 m tall, the trunk slightly buttressed, the bark thin, blackish, the young branchlets minutely puberulous but soon glabrescent; stipules not seen; petioles terete, glabrous, 3-4.5 cm long; rachis glabrous, terete, 11-20 cm long, estipellate; leaflets glabrous, 3- or 4-jugate, the petiolules 5.5-7 mm long, the blades oval to elliptic, those of the basal pair 9.5-11 cm long, 5-5.5 cm wide, the other leaflets 12-16 cm long, 5.5-6 cm wide, the base rounded but acute at the petiolule, the apex abruptly long-acuminate, the costa impressed above, salient beneath, the primary veins plane; inflorescences ramuligerous, 10-14 cm long, glabrous, racemose, the bracts deciduous, triangular, ca 1.5 mm long and 1 mm wide, strigulose externally, the bracteoles persistent, arising in the upper third of the pedicel, lanceolate, ca 1 mm long and 0.6 mm wide, sparsely strigulose externally; pedicels 20-52 mm long; buds oval in outline, ca 17 mm long and 14 mm wide, glabrous, verruculose; calyx segments 4, glabrous, verruculose; petal white, glabrous, the claw ca 10 mm long, the blade oblate, cordate basally, ca 25 mm long and 35 mm wide; larger stamens 5-9, glabrous, the filaments 20-30 mm long, the anthers oblong, 2.5-3 mm long, 1 mm wide, the smaller stamens glabrous, the filaments 14-17 mm long, the anthers broadly oblong, 1.5 mm long; gynoecium whitish, glabrous, the stigma obliquely capitellate, the style 11-13 mm long, the ovary arcuate-fusiform, 8-12 mm long, 2-2.5 mm wide, the gynophore 9-18 mm long; fruit not seen.
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Discussion
The nearest affinity of this species is with S. polyphylla; the leaves of the two species are quite similar in aspect and there are other less obvious similarities. The buds are verruculose as in S. polyphylla but those of S. longipedicellata are much larger and somewhat differently shaped. The length of the pedicels is such that this species could scarcely be confused with any other of this section.
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Common Names
Serebedan
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Distribution
(Fig. 12). Known only from the type collection which was made in the lowland, riverine forests of central Guyana.
Guyana South America|