Drosera citrina
| Drosera citrina | ||||||||||||
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Drosera citrina |
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| Drosera citrina | ||||||||||||
| Lowrie & Carlquist |
Drosera citrina 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 citrina is a perennial herbaceous plant . This rosette-forming dwarf sundew reaches a diameter of about 1.5 cm. The stem axis is 1 cm long and covered with the withered leaves of the preseason.
The bud of the stipules is broadly ovate, rounded, 4.5 mm long and 5.5 mm in diameter at the base. The stipules themselves are 4.5 mm long, 3 mm wide and three-lobed. The middle lobe is divided into 3 segments.
The leaf blades are broadly elliptical, up to 1.5 mm long and 1.2 mm wide. The leaf stalks are lanceolate, up to 5 mm long, 1 mm wide at the base and taper to 0.3 mm at the leaf blade.
The one or two flower stalks are up to 4 cm long and densely covered with tiny glandular hairs. The inflorescence is a coil of 12 or more flowers on around 2.5 mm to 3 mm long pedicels. The egg-shaped sepals are 2 mm long and 1.2 mm wide. The surface is occasionally covered with glands. The lemon-yellow petals are white at the base, egg-shaped, 5 mm long and 3.5 mm wide.
The ovary is shell-shaped, 0.6 mm long and 1 mm in diameter. The 3, sometimes 4 white styluses are 3 to 4.5 mm long and thread-shaped. The scars are also white, directed horizontally and tapering to a point at the end. Fruit and seeds are unknown.
The formation of brood scales is typical for dwarf sundews.The approximately egg-shaped, relatively thin brood scales are formed in large numbers (in cultivation in the northern hemisphere) between the end of November and the beginning of December and are approx.1.4 mm long and 1 cm wide ,1 mm.
Distribution, habitat and status
Drosera citrina only occurs in a small area in the extreme southwest of Australia. The soils of the habitat are unknown.
Systematics
The name "citrina" comes from Latin and means "lemon-colored" (citrinus = lemon-colored). Drosera citrina was described as a species by Allen Lowrie and Sherwin Carlquist in 1992 . Drosera nivea is considered the closest relative. Drosera citrina can be confused with a non-flowering Drosera pycnoblasta , a species with a smooth, round stipple bud .
Drosera citrina was erroneously referred to as Drosera rechingeri in the second volume by Allen Lowries Carnivorous Plants of Australia .
literature
- Allen Lowrie , Sherwin Carlquist: Eight new taxa of Drosera from Australia. In: Phytologia. Vol. 73, No. 2, 1992, ISSN 0031-9430 , pp. 98-116, here pp. 99-100 .
Individual evidence
- ^ Allen Lowrie: Carnivorous Plants of Australia. Volume 2. University of Western Australia Press, Nedlands 1989, ISBN 0-85564-300-5 .