Drosera patens
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| Drosera patens | ||||||||||||
| Lowrie & Conran |
Drosera patens is a carnivorous plant belonging to the genus sundew . It belongs to the dwarf sundew and wasfirst describedin 2007 by Allen Lowrie and John Godfrey Conran .
description
Drosera patens is a small, perennial, herbaceous plant with fine, fibrous roots. The rosette-shaped growing species reaches a diameter of 18 to 25 millimeters and a height of 2 to 5 millimeters.
The leaf stalks are approximately linear, slightly widened towards the middle, strongly flattened ovate in cross section, 5 to 8 millimeters long, 0.5 to 0.7 millimeters wide, tapered to 0.2 to 0.5 millimeters at the extreme point and with numerous, tiny glands occupied. The leaf blades are narrowly ovate to elliptical or vice versa ovate, 1.8 to 3 millimeters long and 1.3 to 2.5 millimeters wide. The leaves are green at the base and reddish towards the end. The bud, formed from stipules and covered with hairs, is egg-shaped, fringed, 5 to 6.5 millimeters high and 5 to 5.5 millimeters in diameter. The single stipple is 4 to 4.5 millimeters long and 3 to 4 millimeters wide, three-lobed, the middle lobe is divided into three sections, the middle with one or two slit leaves, the lateral lobes with two to three slit leaves.
The inflorescence axis is 25 to 50 millimeters long with inflorescence , without 10 to 20 millimeters long and with stalked glands. The inflorescence is a coil , the flower stalks are 1.5 to 2 millimeters long and lengthen up to 6 millimeters as the fruit ripens. The bracts are awl-shaped and covered with glandular hairs. There are six to fourteen flowers on the inflorescences . The 1.5 to 2 millimeters long and 0.6 to 0.8 millimeters wide sepals are narrowly ovate to ovate. The wedge-shaped petals are white with a reddish central rib, 3 to 3.8 millimeters long and 1.8 to 2.8 millimeters wide.
The anthers are red, pollen yellow. The ovary is the reverse-ovoid, 1.2 millimeters long and 0.7 millimeters in diameter. The three to four scars are kidney-shaped and dark red.
The brood scales formed in the center of the rosette are egg-shaped, three-lobed at the base, tapering to a point at the end, 1.5 millimeters long, 0.9 millimeters wide and 0.2 millimeters thick.
Distribution, habitat and status
Drosera patens grows at only four locations in southwestern Western Australia near Perth in an area of just over 20 km² near Lake Gnangarra . A huge form from the area 15 kilometers south of Perth became extinct due to land development measures. Drosera patens grows on the edges of swamps, lakes and seasonal wetlands.
Systematics
As part of his work on the dwarf sundew, Allen Lowrie and Neville Marchant classified and described specimens as a subspecies of Drosera nitidula in 1992 . A species Drosera ericksoniae , which he described at the same time , turned out to be identical to the holotype of Diels' Drosera omissa during a revision of the Drosera nitidula complex in 2007 and was therefore classified as a synonym. However , the plant classified by Lowrie and Marchant as a subspecies of Drosera nitidula was not identical to Diels Drosera omissa and was therefore newly described as Drosera patens , but in December 2007 Jan Schlauer described it again as a variety of Drosera nitidula .
literature
- Allen Lowrie, John G. Conran: A revision of the Drosera omissa / D. nitidula complex (Droseraceae) from south-west Western Australia. In: Taxon. Vol. 56, No. 2, 2007, ISSN 0040-0262 , pp. 533-544, JSTOR 25065808 .
