Drosera rupicola
Drosera rupicola, top view
Drosera rupicola is a carnivorous plant in the genus Sundew ( Drosera ). It was first described in 1982 by Neville Marchant as a subspecies of Drosera stolonifera, but Allen Lowrie 2005 they classified as separate species. It belongs to the so-called " Knollendrosera ", a group of Sonnentauen, mostly from the south-west Western Australia, forms the tubers as outlasting.
Description
Vegetative characteristics
Drosera rupicola is a perennial, herbaceous plant that grows from a red, winding, up to 3 inches long and 2 inches in diameter measured tuber to the brown as remnants of previous years, papery cases are. The underground runners reach 15 to 20 centimeters in length, aboveground foothills to 5 centimeters in length, in good conditions develop at their daughter tubers. The plant as a whole is golden green, reddish or bronze.
The three to five unbranched, up to 15 centimeters tall stalks are semi-erect from a - sometimes missing - basal rosette.
The rosette leaves are stalked, the stalk reaches a length of 2.5 to 11 mm, is flattened ( 1-3 mm) and wider ( 1.5 to 5 mm). The leaf blades are obovate, 3-9 mm long and 3-10 mm wide.
The leaves on the stem are arranged in whorls of three to four per stem. They are stalked, the stalk reaches a length of 5 to 7 millimeters, along slightly folded, 0.5 to 2 mm thick and 1-3 mm wide. The shape of the leaf blades is very variable, ranging from transversely elliptic to ovate to flattened. It is 4 to 10 millimeters long and 5.5 to 15 millimeters wide. The tops of all leaves is towards the end occupied at the edge with a little longer, shorter muzzle middle tentacles, the tentacles at the edges are movable and turn on captured insects. The only way the section Drosera rupicola can move the spreading.
Inflorescence and flowers
The one to four inflorescence axes wear simple grapes and spring from the rosette at the base, but occasionally the axils on the lower part of the stems. The hairless, green flower stems are 10 to 12 inches long and have 8 to 10 fragrant flowers that stay open until their pollination. The flower stems are smooth, cylindrical, green, and 6 to 17 millimeters long. The sepals are green, broadly ovate or elliptical and pointed, and reach a length of 2.5 to 4 millimeters and a width of 1.5 to 2.5 mm, the edges are easy on the back half, irregularly dentate or cut to the top, on the bottom a few tiny sessile glands are distributed, otherwise they are smooth. The petals are obovate, obtuse and slightly notched at the tip. Its basic color is white, they are 9-10 mm long and 5-6 mm wide.
The five stamens are 2.5 to 3 millimeters long and completely white, the pollen is yellow. The yellow ovary is roughly circular, about 1.5 mm long and has a diameter in the heyday of approximately 2 millimeters. The three pens are white and red at the base, they are a total of about 1.5 millimeters long and divided at the base into many sections that are arranged almost wirtelförmig in the lower part. The scars form one to three bump- shaped outgrowths at each tip.
Fruits
The capsule fruit is broadly obovate with a diameter of 4.5 to 5 millimeters and contains approximately 28 gray-brown, irregular, but roughly rectangular to cylindrical-shaped seeds that are 1 to 1.3 mm long and 0.8 to 1 millimeter wide and are provided with reticulate, irregularly ribbed surface.
Dissemination, locations, hazard
The species is native to southwestern Western Australia in the space between Pithara (240 km north of Perth ) and Hyden (about 350 km east of Perth, near the Wave Rock ). The sites are all wet in the winter and in the summer completely dry granite and clay soils on granite. In their area of distribution, the species is often, therefore it is considered safely.
System
Drosera rupicola is part of section Stoloniferae in the subgenus Ergaleium. The specific epithet means as much as " rock dweller" and refers to the locations of the Art
Evidence
- Allen Lowrie: A taxonomic revision of Drosera section stolonifera ( Droseraceae ), from south -west Western Australia, in: Nuytsia 15:3, 2005, pp. 355-393