Drosera grievei
| Drosera grievei | ||||||||||||
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| Scientific name | ||||||||||||
| Drosera grievei | ||||||||||||
| Lowrie & NGMarchant |
Drosera grievei is a carnivorous plant of the genus sundew ( Drosera ). It belongs to the group of so-called dwarf sundews and is native to southwestern Australia.
description
Drosera grievei is a perennial herbaceous plant . This forms a compact, curved rosette with a diameter of about 1.2 cm. The stem axis is up to 2 cm long and covered with withered leaves from the preseason.
The bud of the stipules is ovate, 3 mm long and 2 mm in diameter. The stipules themselves are 3 mm long, 2 mm wide and three-lobed. The middle lobe is divided into 3 segments, 5 mm long and 4 mm wide.
The 20 to 30 leaf blades are circular and have a diameter of up to 0.7 mm. The leaf stalks are up to 3.6 mm long, 0.5 mm wide at the base, widen shortly afterwards to 0.8 mm and taper to 0.2 mm at the leaf blade.
The flower stem is up to 3 cm long and covered with tiny hairs. The inflorescence is a coil of 5 to 10 flowers on approximately 2.5 mm long pedicels. The very broad, egg-shaped sepals are 2.5 mm long and 2.5 mm wide. The tips are serrated irregularly. The white petals are elongated, 4 - 4.5 mm long and 2 mm wide.
The threads are white, the anthers and pollen are yellow. The ovary is shell-shaped and 0.7 mm long. The 4 horizontally protruding styluses are 0.5 mm long and 0.1 mm in diameter. The scars are sickle-shaped, 1.2 mm long and 0.15 mm in diameter at the base.
Distribution, habitat and status
Drosera grievei occurs only on a small area in the extreme southwest of Australia. The plant thrives there in clayey sand on heathland under and between low bushes.
The species is currently classified as Priority One in Western Australia , a level for taxa that occur in only one or a few locations and require closer observation, since it is assumed to be a current threat.
Systematics
Drosera grievei was named after Prof. Brian Grieve, who made a great contribution to the knowledge of the flora of Western Australia. The plant was described as a species by Allen Lowrie and Neville Graeme Marchant in 1992 .
literature
- Allen Lowrie , Neville Marchant: Four new Drosera taxa from south western Australia. In: Nuytsia . Vol. 8, No. 3, 1992, pp. 323-332, here p. 328, ( digitized version (PDF; 1.1 MB) ).
