Drosera burmannii
Drosera burmanni, Phukradung, Thailand
Drosera burmanni is a carnivorous plant in the genus Sundew ( Drosera ). The plant is widely distributed in the Australasian region. In China it is used medicinally.
Description
In Drosera burmanni is a small rosette- forming sundew with flat, down to earth rosette, which measures about 1.2 to 2 cm in diameter, depending on the location it is one to two years old. The root system consists of a few fibrous roots. The chromosome number is 2n = 20
The nearly sessile to short-stalked, tentacle occupied, spatulate catch leaves are 5-7 mm wide and 6-10 mm long, yellowish green or red to reddish purple. They have a special feature: the unusually long and very fast-moving marginal tentacles, which can move within a few seconds. They enclose the prey within a very short time like a cage and press the prey against the blade, making the contact with the tentacles of the leaf surface is enhanced.
The plants bloom all year round. The flower stalk reaches a height of 6 to 22 cm, which are one or two inflorescences wrap and carry 2 to 19 flowers. The petals ( petals ) are white, rarely up pink, about 4 mm long and 2-3 mm wide. The nearly round fruit node forms after successful pollination of numerous dark brown to black seeds.
Dissemination
The species is widespread in Australasia, from China to East and Southeast Asia to Australia. It thrives in shady, wet substrates at altitudes of up to 1500 m.
System
The species was first described in 1794 by Martin Vahl. Together with the morphologically very similar and closely related Drosera sessilifolia it forms the subgenus Thelocalyx the Sonnentaue.
The epithet has been chosen orthographically wrong by Vahl, correctly would burmannii. Because of botanical nomenclature rules, however, the name may not be corrected.
Use
Drosera burmanni is largely meaningless to the people as a useful plant. Of lovers she is occasionally cultivated. In Asian countries, they - like other sundew species is also - as a medicinal plant collected in large quantities and exported to European countries, among others. Since the collections held not sustainable, Drosera burmanni is threatened partly locally by over-harvesting, such as in Andhra Pradesh.