Monographs Details:
Authority:
Cowan, Richard S. 1967. Swartzia (Leguminosae, Caesalpinioideae Swartzieae). Fl. Neotrop. Monogr. 1: 3-228. (Published by NYBG Press)
Cowan, Richard S. 1967. Swartzia (Leguminosae, Caesalpinioideae Swartzieae). Fl. Neotrop. Monogr. 1: 3-228. (Published by NYBG Press)
Family:
Fabaceae
Fabaceae
Description:
Description - Tree 22 m tall, the trunk 1.5 dm diameter, the branchlets dark-brown velutinous; stipules caducous, 4 mm long, 2.5-3 mm wide, ovate, acute, velutinous externally, strigulose basally within; petioles terete, bluntly stipellate at the apex, 2-5 cm long, dark-brown velutinous, the rachis 7-10 cm long, canaliculate, stipellate at each pair of leaflets, dark-brown velutinous; leaflets (l-)3- (or 4-) jugate, the petiolules 2-4 mm long, velutinous, the blades of the lowermost pair smaller and oval to oblong-oval, 4.5-9 cm long, 3-4.5 cm wide, the remaining blades elliptic to elliptic-oblong, 8.5-14 cm long, 3.5-6 cm wide, the base and apex of all the leaflets rounded-obtuse, sometimes the apex apiculate, more or less tomentose on both sides, the venation conspicuous, impressed on the upper surface, salient beneath; inflorescence racemose, ramigerous, 5-20 cm long, the axis tomentose-velutinous, the bracts persistent, 2-4 mm long, 3-3.5 mm wide, ovate, velutinous externally, strigulose in the basal half within, the bracteoles persistent, arising at the apex of the pedicels, 2-3 mm long, 0.5-1 mm wide, oblong, acute, velutinous externally; pedicels 12-22 mm long, velutinous; buds subglobose, ca 10 mm long, 9 mm diameter, velutinous; calyx segments 4, thick, coriaceous, velutinous externally, glabrous within; petal bright yellow, the claw 3-3.5 mm long, the blade 25-30 mm long and wide, oblate-ovate, cordate, villose-sericeous externally, especially on the veins, glabrous within; large stamens 13-18, glabrous, the filaments ca 20 mm long, the anthers oblong narrowly, 2 mm long, 0.7 mm wide, the smaller stamens glabrous, the filaments 8-12 mm long, the anthers oval, 1 mm long; gynoecium glabrous, the stigma truncate-capitellate, the style 5-8 mm long, the ovary 17.5-25 mm long, 1-1.75 mm wide, arcuate-linear, the stipe 7-9.5 mm long; fruit not seen.
Description - Tree 22 m tall, the trunk 1.5 dm diameter, the branchlets dark-brown velutinous; stipules caducous, 4 mm long, 2.5-3 mm wide, ovate, acute, velutinous externally, strigulose basally within; petioles terete, bluntly stipellate at the apex, 2-5 cm long, dark-brown velutinous, the rachis 7-10 cm long, canaliculate, stipellate at each pair of leaflets, dark-brown velutinous; leaflets (l-)3- (or 4-) jugate, the petiolules 2-4 mm long, velutinous, the blades of the lowermost pair smaller and oval to oblong-oval, 4.5-9 cm long, 3-4.5 cm wide, the remaining blades elliptic to elliptic-oblong, 8.5-14 cm long, 3.5-6 cm wide, the base and apex of all the leaflets rounded-obtuse, sometimes the apex apiculate, more or less tomentose on both sides, the venation conspicuous, impressed on the upper surface, salient beneath; inflorescence racemose, ramigerous, 5-20 cm long, the axis tomentose-velutinous, the bracts persistent, 2-4 mm long, 3-3.5 mm wide, ovate, velutinous externally, strigulose in the basal half within, the bracteoles persistent, arising at the apex of the pedicels, 2-3 mm long, 0.5-1 mm wide, oblong, acute, velutinous externally; pedicels 12-22 mm long, velutinous; buds subglobose, ca 10 mm long, 9 mm diameter, velutinous; calyx segments 4, thick, coriaceous, velutinous externally, glabrous within; petal bright yellow, the claw 3-3.5 mm long, the blade 25-30 mm long and wide, oblate-ovate, cordate, villose-sericeous externally, especially on the veins, glabrous within; large stamens 13-18, glabrous, the filaments ca 20 mm long, the anthers oblong narrowly, 2 mm long, 0.7 mm wide, the smaller stamens glabrous, the filaments 8-12 mm long, the anthers oval, 1 mm long; gynoecium glabrous, the stigma truncate-capitellate, the style 5-8 mm long, the ovary 17.5-25 mm long, 1-1.75 mm wide, arcuate-linear, the stipe 7-9.5 mm long; fruit not seen.
Discussion:
Sandwith was quite correct in suggesting considerable affinity between S. picta and S. xanthopetala, but an even closer relationship appears to exist with S. leiogyne, which has differently shaped leaflets and a marginate to narrowly alate leaf rachis. S. picta can be distinguished also by its sinuate-dentate petal and its leaflets being glaucous beneath.
Sandwith was quite correct in suggesting considerable affinity between S. picta and S. xanthopetala, but an even closer relationship appears to exist with S. leiogyne, which has differently shaped leaflets and a marginate to narrowly alate leaf rachis. S. picta can be distinguished also by its sinuate-dentate petal and its leaflets being glaucous beneath.
Distribution:
Guyana South America|
Guyana South America|