Drosera trinervia
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Drosera trinervia |
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Drosera trinervia is a carnivorous plant of the genus sundew ( Drosera ). It is native to South Africa and wasfirst describedby Curt Polycarp Joachim Sprengel in 1820. The type epithet refers to the three- veined leaves.
description
Drosera trinervia are small herbaceous plants . They grow as a cup-shaped rosette with one or two long roots that are slightly swollen.
The leaves are sessile, the stipules are reduced to two small thread-like remains, one on each side of the base of the leaf margin and obsolete. The blades are inverted-wedge-shaped, about 1 centimeter long and 5 millimeters wide, at the end blunt. The marginal tentacles at the outer end have flattened glandular heads and are significantly larger than the other tentacles. The undersides of the leaves are smooth and three-veined.
The inflorescences arise in the middle of the rosette, the inflorescence axis is upright and 5 to 10 centimeters long, sometimes longer. At its end it usually bears two to three, rarely up to ten flowers that are close to each other, the flower stalks are 1 to 8 millimeters long. The sepals are fused, the individual lobes are up to 5 millimeters long. The petals are white, rarely purple and broadly inverted-egg-shaped to wedge-shaped and have an approximate length of around 8 millimeters, after wilting they become awl-shaped and are pushed out of the round calyx. The stamens are slender, the connective widened. The three styles are divided from the base, upright, the scars fan-shaped. The capsule fruits are oblong and round, the seeds ovate, black-brown and 0.3 millimeters long.
The number of chromosomes is 2n = 40.
distribution
The species is restricted to the southwestern Capensis and is one of the most common species there. It is mostly found in moist, peaty locations on slopes between fynbos .
literature
- Anna Amelia Obermeyer: Droseraceae. In: The Flora of Southern Africa. Volume 13: Cruciferae, Capparaceae, Resedaceae, Moringaceae, Droseraceae, Roridulaceae, Podosfemaceae, Hydrostachyaceae. Botanical Research Institute - Department of Agricultural Technical Services - Republic of South Africa, Pretoria 1970, pp. 187-201.
Individual evidence
- ^ Drosera trinervia at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
