Drosera solaris

Drosera solaris is a carnivorous plant from the family of sundew plants ( Droseraceae ) and was first described by Andreas Fleischmann, Andreas Wistuba and Stewart McPherson, 2007. It is endemic in a mountain range in Guyana, South America.

Description

Drosera solaris is a perennial, herbaceous plant. It forms as a young plant a basal rosette, grows with age, but more in height, reaches a height of up to ten centimeters, forming a several times branching shoot axis. At the upper end of the stem axis, the leaves are in a rosette shape, young leaves are pointing upwards, older leaves turn back. Dead leaves does not fall off, but hangs down to the stem axis to which it forms a thickening towards the top coat.

At the base of the petiole, about one millimeter in this grown, are found grown together, initially white, later yellowish-brown stipules, membranous, 7.5 to 8 millimeters long and the leaf blade down into four approximately 7 mm long, narrow - lanceolate to filiform, tapering segments slotted. The green to golden yellow petiole is 7 to 7.5 mm long and up to 1 mm wide, on its upper surface finely papillose, occupied at the bottom with 1 to 2 millimeters long, white hair. The red leaf blade is approximately circular, rounded at the tip, 2-3 mm long and 2 to 2.5 millimeters wide and busy at the edge and at the top with stalked glands to catch prey.

The one or two upright inflorescences are 6 to 7.5 millimeters long and have only one or two flowers. The flower stalk is, if present at all, with more than 0.2 millimeters in length is extremely short. The upright flower stalk hand, is 4 to 5.5 mm long and densely hairy at the base with 1 to 2.5 mm long, white hair. For flowers approach towards these less are, interspersed only up to a millimeter long and short-stalked glandular hairs. The bell-shaped calyx is 4 millimeters long and 3 millimeters wide; he is both with white, up to 0.5 mm long hairs busy as well with short-stalked glandular hairs. The broad - lanceolate, red sepals are 2 to 2.5 millimeters long and mid-length up to 2 mm wide, stand upright during the flowering and turn back at the fruit. The white petals are broadly inversely egg-shaped, 2.5 mm long and 2 mm wide.

The white stamens are up to 0.2 mm thick, the connective is widened, anthers and pollen are yellow. The nearly round ovary is about 1 millimeter thick, smooth and greenish- yellow. It can be found at the base of three undivided, after 0.1 mm, however, branching, about 2 mm long stylus. They are smooth, reddish at the base and towards the tip white, the scars are divided into two parts to fächrig. The capsules opened longitudinally along the capsule walls and form after opening a shell, in which lie the seeds and from which the seeds are thrown out by the " charge " of a raindrop from the seed capsule ( Raindrop or splash Cup dissemination ). The egg-shaped to nearly round seeds are just 0.6 millimeters long, black and shiny.

Distribution and habitat

The species is known only from the collection of the holotype on Mount Yakontipu in Guyana on the border with Brazil in the border region with Venezuela; Deposits on adjacent mountain peaks but are suspected. Drosera solaris thrives there just below the summit at 2065 meters above sea level on a plateau in a small clearing in the cloud forest of Bonnetia roraimae. There she is associated with marsh pitcher hybrids, Epidendrum species, Stegolepis guianensis, Xyris species and Orectanthe sceptrum. The site is located at a clear shadow on peaty substrate with plenty of foliage; isolated full sun standing specimens are particularly heavily stained. Locations in Bonnetia roraimae forests seem to be essential. In the more higher-lying open wetlands of the summit Drosera solaris missing here Drosera is instead roraimae widespread.

System

Drosera solaris was discovered in September 2005 and the end of 2007 first described by Andreas Fleischmann, Andreas Wistuba and Stewart McPherson. The epithet " solaris " emphasizes the bright - shining appearance of the plants. Although they superficially resemble Drosera meristocaulis, on closer consideration their relationship with Drosera Drosera felix or kaieteurensis. Especially seed dispersal is a common feature; All three types are Regenballisten. Like these, they will be classified in the subgenus of the same name in the section Drosera.

Evidence

• Andreas Fleischmann, Andreas Wistuba, Stewart McPherson: Drosera solaris ( Droseraceae ), a new sundew from the Guiana Highlands. In: Willdenowia. Volume 37, 2007, pp. 551-555.