Brunfelsia chocoensis
| Brunfelsia chocoensis | ||||||||||||
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| Brunfelsia chocoensis | ||||||||||||
| Plowman |
Brunfelsia chocoensis is a species from the Guianenses section of the genus Brunfelsia . It is endemic to the Colombian province of Chocó .
description
Vegetative characteristics
Brunfelsia chocoensis is a shrub up to 2 m high , the sparsely developed branches of which have a circular cross-section, are gray to gray-brown and appear somewhat bumpy at the nodes . The twigs have a diameter of 3 mm, they are hairless, shiny and light gray-brown.
The plants have relatively few leaves , which are in groups at the ends of the branches on 10 to 15 mm long, strong, brown petioles . The leaf blades are 18 to 28 cm long and 9 to 11 cm wide, elliptical to elongated, suddenly pointed to a long point at the tip and somewhat sickle-shaped, the base is blunt. The membrane-like leaves are hairless, matt, dark green on the upper side and light green on the underside. Six to seven secondary veins extend from the midrib on each side.
Inflorescences and flowers
The almost sessile inflorescences are either terminal and consist of only one flower or axillary, then with one to three flowers. The flowers themselves are fragrant and are supported by 2 to 4 mm long, foliage-like bracts , which are ovate to ovate-lanceolate, concave and finely ciliate on the edge. They stand on 5 to 6 mm long, upright, slender and hairless flower stalks .
The calyx is 8 to 12 mm long and measures 3 to 6 mm in diameter. In the bud it is initially spherical, later tubular-bell-shaped. The sepals are hairless, tightly membrane-like, the reticulated veins are protruding. The calyx teeth have a length of 2 to 4 mm, they are erect, ovoid, blunt to pointed. At the time of flowering, the calyx has a length of about 13 mm, it remains on the fruit and is dotted with cork warts.
The white crown consists of five fused petals. The corolla tube has a length of 22 to 27 mm and a diameter of 2 to 2.5 mm, at the transition to the coronet it measures 5 mm. The coronet itself has a diameter of 22 to 25 mm. The corolla lobes are 8 to 10 mm long, almost identical in shape, rounded at the tip, rarely bulging at the edge and slightly overlapping above the base.
The four stamens start in the upper third of the corolla tube, the somewhat flattened stamens are about 5 mm long. The stamens of the two stamens below are bent upwards at the tip, the two stamens above are almost straight. The light brown anthers are about 2 mm long and spherical to kidney-shaped.
The ovoid ovary is 2.5 mm high, the lean Botany has mm a length of 10 to 20 The scar is 1.5 mm long, bilobed and easily unfolding, the upper lobe is slightly larger.
Fruits and seeds
The fruits are 2 to 3 mm long and also have a diameter of 2 to 3 mm. They are spherical to ovate, smooth, yellow when ripe. They have a soft, fleshy mesocarp , which is up to 1.5 mm thick, the endocarp is thin and cartilaginous.
The fruits contain only two to five seeds , these are 8 to 10 mm long and 6 to 7 mm in diameter. They are ovate-elliptical, angled, dark brown and granular like a network. The unbent embryo is about 8 mm long , the cotyledons are 3.5 mm long and broadly elliptical.
Occurrence and locations
Brunfelsia chocoensis occurs in a demarcated area in the northern part of the Colombian province of Chocó , in a low-lying valley of the Río Atrato . The area borders Serranía de Baudo to the west and Serranía de Abibe to the east. In the north, the area extends across the Panamanian border to Cerro Pirre .
Although it is assumed that further collections could show that the species occupies a larger area, it appears to be endemic to swampy forests at altitudes of 50 to 200 m.
literature
- Timothy C. Plowman (Author), Sandra Knapp, JR Press (Editor): A Revision of the South American Species of Brunfelsia (Solanaceae) . Field Museum of Natural History, Chicago August 1998, ISBN 978-9998104693 . (Fieldiana Botany, New Series, number 39).