Drosera heterophylla
| Drosera heterophylla | ||||||||||||
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Drosera heterophylla |
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| Scientific name | ||||||||||||
| Drosera heterophylla | ||||||||||||
| Lindl. |
Drosera heterophylla is a carnivorous plant from the genus of the sundew ( Drosera ) and wasfirst describedby John Lindley in 1839.
description
Drosera heterophylla is an upright plant up to 20 cm high with many 5 to 10 mm long bracts on the lower part of the plant. It has solitary catch leaves along the rest of the stem axis .
The leaf blades are broadly kidney-shaped with short lobes, 3 mm long and 6 mm wide and point outwards. Longer tentacle glands are located along the slightly concave edge. Smaller tentacle glands inside. The leaf stalks are slender, tapering and 5 to 15 mm long.
Flowering time is from June to September. The inflorescence sits at the top of the plant and consists of 1 to 4 white flowers on 2 to 4 cm long, hairless pedicels . The sepals are green, ovate- elliptical, pointed, 5 to 8 mm long and 2 to 3 mm wide. The edges and the tips are serrated irregularly . The surface is covered with large, almost sessile, reddish glands. The up to 12 petals are inverted lanceolate , 10 to 18 mm long and 4 to 6 mm wide with slightly serrated tips. The 8 to 12 stamens are different, 2 to 4 mm long. The stamens are white, the anthers are white, and the pollen is yellow. The ovary is green, elliptical, 1.5 mm in diameter and 2 mm long. The 3 styluses are white, branch out from a short, raised column into many flattened-round segments and form a dense, rounded head. The scars are white and are located on each stylus segment.
The tuber is white, almost spherical, has a diameter of around 10 mm and is wrapped in some paper-like leaf sheaths. It is located on a 4 to 6 cm long, vertical branch. Like all so-called "Tuberous Drosera", it retreats into this tuber at times of high temperatures and relative dryness and survives underground.
The number of chromosomes is 2n = 30.
Distribution, habitat and status
The species is endemic to the area near Mingenew , Wongan Hills and Perth in southwest Australia. It thrives there on the edges of swamps and is often found in shallow water. Humid, clayey areas, pools with granite outcrops and rivers that exist in winter are also populated. All of these habitats dry out completely in summer.
Systematics
Drosera heterophylla belongs to the subgenus Ergaleium , Ergaleium section, i.e. to the climbing bulbous drosera.
literature
- Allen Lowrie : Carnivorous Plants of Australia. Volume 1. University of Western Australia Press, Nedlands 1987, ISBN 0-85564-253-X , p. 28.
Individual evidence
- ↑ Drosera heterophylla at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
