Drosera spilos
| Drosera spilos | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Drosera spilos | ||||||||||||
| NGMarchant & Lowrie |
Drosera spilos 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 spilos is a perennial herbaceous plant . This forms a compact, rosette-shaped bud made of leaves with a diameter of about 1.5 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 conical, bristly, 5 mm long and 3 mm in diameter at the base. The stipules themselves are 4.5 mm long, 1.3 mm wide, 0.8 mm wide at the base and three-lobed. The middle lobe is divided into 2 segments and the edges are irregularly sawn . Each segment is double fringed at the top. The outer edges of the lateral flap are also irregularly sawn , the tips simply fringed. At the tip of the inner margin is a characteristic, irregularly sawn segment that is 1.5 mm longer than the central lobe.
The leaf blades are broadly elliptical , 2 mm long and 1.5 mm wide. The longer tentacle glands are on the edge, the shorter ones on the inside. There are some glands on the underside. The leaf stalks are 5.5 mm long, 0.5 mm long at the base, widen to 0.6 mm in the middle and taper to 0.5 mm at the leaf blade. Some of them are lanceolate with a few glands on the underside, otherwise they are hairless.
Flowering time is October to November. The one or two flower stalks are 7 cm long and sparsely covered with glands in the lower part. The glands become denser towards the tip. The inflorescence is a wrap of up to 15 flowers on approximately 2 mm long pedicels. The closely obovate sepals are 2 mm long and 1.2 mm wide. The margins are entire , the tips irregularly notched . The entire surface is covered with some white, cylindrical, red-headed glands. The petals are white or pink, often dark pink on the edges and at the tip, with a conspicuous dark pink colored spot at the base. They are obovate , including the wedge-shaped finger at the base 7 mm long and 4.5 mm wide. The margins and the tips are entire .
The five stamens are 1.8 mm long. The stamens , the anthers and the pollen are white. The pale green ovary is top-shaped, 0.6 mm long and 1 mm in diameter. The 3 greenish-white, horizontal styluses are 0.5 mm long at the top and 1 mm long at the bottom of the scar. The stylus-scar segment is flattened round, 3 mm long, narrow at the base, widened in the middle and tapering to a point. The scars are white.
The formation of brood scales is typical for dwarf sundews : The broad, egg-shaped, 0.9 mm thick brood scales are formed in large numbers from late November to early December and are approx. 1 mm long and 0.9 mm wide.
Distribution, habitat and status
Drosera spilos occurs only on a small area in the extreme southwest of Australia. The plant thrives there on clay soils that are covered with laterite gravel. Known populations are found at Muchea , Cataby, and Eneabba .
Systematics
The name "spilos" comes from the Greek and refers to the spots on the petals ("spilos" = spot). Drosera spilos used to be grouped to form Drosera leucoblasta like all Drosera with flattened round stylus-scar sections . This species can be distinguished by the completely white stamens , the conical, bordered bud of the stipules and the drooping fruit.
literature
- Allen Lowrie: Carnivorous Plants of Australia. Volume 2. University of Western Australia Press, Nedlands 1989, ISBN 0-85564-300-5 , p. 170.
