Drosera nivea
| Drosera nivea | ||||||||||||
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| Scientific name | ||||||||||||
| Drosera nivea | ||||||||||||
| Lowrie & Carlquist |
Drosera nivea is a carnivorous plant from the genus sundew ( Drosera ). It belongs to the group of so-called dwarf sundews and is native to southwestern Australia.
description
Drosera nivea is a perennial herbaceous plant . This dwarf sundew , which forms a compact convex rosette, reaches a diameter of about 1.3 cm. The stem axis is 1.5 cm long and covered with the withered leaves of the preseason. Often you can see up to 3 rosettes that crowd at the end.
The bud of the stipules is ovate, 4 mm long and 3 mm wide. The stipules themselves are 4 mm long, 2.5 mm wide and three-lobed. The middle lobe is divided into 3 segments. Each of these segments narrows into hairs.
The up to 20 insect-catching leaf blades are elliptical, deeply indented, up to 1.4 mm long and 1 mm wide. The leaf stalks are 4 mm long, 0.5 mm wide at the base and taper to 0.2 mm at the leaf blade.
The flower stem is up to 3 cm long and sparsely covered with tiny glandular hairs. The inflorescence is a coil of 5 to 10 flowers on approximately 1.5 mm to 2 mm long pedicels. The ovate sepals are ovate, serrated at the tip, 2 mm long and 1.4 mm wide. The surface is covered with isolated glands at the base. The white petals are inverted ovate, 4.5 mm long and 3 mm wide.
The ovary is approximately circular, 0.5 mm long and 0.7 mm in diameter. The 4, sometimes 5, red, horizontally elongated styluses are 0.5 mm long and 0.1 mm in diameter. The 3.5 mm long scars are white, thread-like and tapering to a point at the end. Fruit and seeds are unknown.
The formation of brood scales is typical of dwarf sundews .
Distribution, habitat and status
Drosera nivea occurs only on a small area in the extreme southwest of Australia. It thrives there mainly under and between low bushes on pale yellow sand plains next to Midlands Road , 37.3 km southeast of Carnamah, about 10 km southeast of Coorow Township .
Systematics
The name "nivea" comes from Latin and means "snow white", which refers to the color of the flowers. Drosera citrina is considered the closest relative, but differs in the shape and color of the flower.
literature
- Allen Lowrie, Sherwin Carlquist: Eight new taxa of Drosera from Australia. In: Phytologia. Vol. 73, No. 2, August 1992, ISSN 0031-9430 , pp. 98-116, here pp. 104-105 .