Drosera leucoblasta
| Drosera leucoblasta | ||||||||||||
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Drosera leucoblasta , flower |
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| Drosera leucoblasta | ||||||||||||
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Drosera leucoblasta is a carnivorous plant of the genus sundew ( Drosera ). It belongs to the group of so-called dwarf sundews and isnative tosouthwestern Australia .
description
Drosera leucoblasta is a perennial herbaceous plant . This forms a flat, compact rosette-shaped bud of horizontal leaves with a diameter of about 2 cm. The stem axis is 3 mm long and covered with few or no withered leaves from the preseason.
The bud of the stipules is ovate, smooth, 7 mm long and 4 mm in diameter at the base. The stipules themselves are 4 mm long, 3.5 mm wide and three-lobed. The middle lobe is divided into 3 segments.
The leaf blades are approximately circular and up to 2.2 mm in diameter. The longer tentacle glands are on the edge, the shorter ones on the inside. The underside is hairless. The leaf stalks are up to 5 mm long, 0.7 mm wide at the base and taper to 0.6 mm at the leaf blade. They are lanceolate and covered with a few glands.
Flowering time is October to November. The one, and rarely two, flower stalks are up to 12 cm long and sparse at the base, with tiny hairs becoming thicker towards the tip. The inflorescence is a coil of 6 to 9 flowers on approximately 1.5 mm long pedicels. The inverted egg-shaped sepals are 3 mm long and 1.8 mm wide. The edges are smooth and slightly notched at the top. The surface is covered with some cylindrical, red-headed glands. The orange petals , reddish-brown at the base, are elongated, with the wedge-like finger at the base 10 mm long and 6 mm wide.
The five stamens are 2.6 mm long. The threads are white at the base, reddish in the center, and again white at the tip. The anthers are pale yellow and the pollen are yellow. The ovary, which is usually yellow-green and often red at the tip, is broadly inverted ovoid, 0.9 mm long and 1.2 mm in diameter. The 3 reddish, horizontally stretched stylus 1 mm long and 0.1 mm thick. They widen for a short distance under the scar. The scars are yellow, slightly sickle-shaped, 2 mm long, 0.15 mm at the base, quickly expand to 0.2 mm and taper evenly to 0.1 mm to the rounded tip.
The formation of brood scales is typical of dwarf sundews.The egg-shaped, 0.6 mm thick brood scales are formed in large numbers from late November to early December and are approx. 1.2 mm long and 0.9 mm wide.
The number of chromosomes is 2n = 14.
Distribution, habitat and status
Drosera leucoblasta occurs only on a small area in the extreme southwest of Australia. The plant thrives there on loamy sand and laterite soils between and under low bushes on heathland. Populations at Esperance, Cranbrook, Arthur River, and Brookton are known.
Systematics
The name leucoblasta comes from the Greek and refers to the white bud of stipules ("leucos" = white; "blasta" = resting bud).
literature
- Allen Lowrie: Carnivorous Plants of Australia. Volume 2. University of Western Australia Press, Nedlands 1989, ISBN 0-85564-300-5 , p. 74.
Individual evidence
- ^ Drosera leucoblasta at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
