Jacaranda caucana Pittier
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Authority
Gentry, Alwyn H. 1992. Bignoniaceae--part II (Tribe Tecomeae). Fl. Neotrop. Monogr. 25: 1-370. (Published by NYBG Press)
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Family
Bignoniaceae
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Scientific Name
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Type
Type. Colombia. Cauca, Pittier 925 (US).
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Description
Species Description - Tree to 25 m tall and 39 cm dbh., the bark smooth, light gray, the branchlets lepidote, terete, gray with whitish lenticels. Leaves bicompound, 24-43 cm long, with 8-18 pinnae, each one 10-14 cm long, the rachis subwinged, 11-23 sessile leaflets per pinnae, these 0.8-3 cm long, 0.4-1 cm wide, parallelogram-shaped with the midvein connecting the two acute angles, the terminal leaflet rhomboid, 3-3.5 cm long, 1.3-1.8 cm wide, apically obtuse or apiculate, base abruptly narrowly cuneate, membranaceous, puberulous on both surfaces, especially along the nerves below with long simple trichomes, above with sparse short trichomes, drying dark green above, grayish below, petiole 4.5-7 cm long, the petiolules 4-10 mm long, lepidote and sparsely simple-puberulous as the rachis. Inflorescence a group of panicles with 3-27 flowers and borne ramiflorously, the pedicels and peduncles simple-puberulous. Flowers with the calyx reduced, broadly campanulate, subtruncate to obtusely 5-dentate, simple-puberulous and sparsely lepidote, 1.5-3 mm long, 3-4 mm wide; corolla purple-blue outside and on lobes, the throat mostly white, tubular-campanulate above a basal swelling 5-9 mm long and 5-7 mm wide, this surmounted by a neck 3-4 mm long and 1-2 mm wide, this bent almost 90 degrees, 3.6-4.8 cm long, 1-2 cm wide at mouth, the tube 3-3.6 cm long, the lobes 0.7-1 cm long, the tube mostly glabrous outside, glandular puberulous on the neck (except ssp. glabrata), the lobes adaxially and the tube densely and minutely lepidote inside, the tube also with a few simple trichomes in the throat and glandular-puberulous with 1-3-celled hairs at level of stamen insertion, at least the abaxial lobe pubescent with long simple or in part bifurcate trichomes, the rest at least ciliate; stamens didynamous, the anthers monothecate, the thecae 1.5-2 mm long, the staminode 2.2-2.5 cm long, glandular-pubescent with long 1-6-celled trichomes at apex and middle; pistil 2-2.6 cm long, the ovary flattened-cylindric, 1.5-2 mm long, 1.5-2 mm wide, 1-1.5 mm thick, appressed puberulous, the ovules 4-6-seriate in each locule; disk pulvinate, 1-1.5 mm long, 1-2 mm wide. Fruit a flattened-oblong capsule with undulating margins when mature, 4.6-8.5 cm long, 3.8-6 cm wide, lepidote, when dry dark with lighter lenticellate dots; seeds 0.8-1.6 cm long, 2.3-4.1 cm wide, the wings brownish to subhyaline, the body not distinctly demarcated.
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Distribution
The species ranges from Costa Rica to Venezuela, occurring mostly in moist forest with a distinct dry season.
Colombia South America|