Drosera banksii
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Drosera banksii |
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| Drosera banksii | ||||||||||||
| R.Br. ex DC. |
Drosera banksii is a carnivorous plant from the genus of the sundew ( Drosera ).
description
In Drosera banksii is an annual herbaceous plant , an upright and unbranched growing kind that reaches a height of between three and twenty-five centimeters. The roots are fine but fleshy. The stem of the plant is hairless at the base, after which it is weakly covered with 0.5 mm long hairs up to the tip.
The leaves are spread apart or slightly bent back on the stem. The thin petiole is 5 to 8 mm long and occasionally tinged with reddish. The kidney- to shield-shaped leaf blades have a diameter between 1 and 1.5 mm. In older plants, only the uppermost leaves of the plant are vital, the lower part is surrounded by old, dead leaves.
The flower stem of the plant that grows laterally out of the trunk is up to three cm long and bears two to ten white, five-fold, radial, hermaphrodite flowers with a diameter of around 5 mm between April and July . The five stamens are up to 1.6 mm long, the pollen is yellow.
The number of chromosomes is 2n = 12.
distribution
Drosera banksii is native to the far north of Australia between Broome and Cairns and western Papua New Guinea , where the plants grow in sandy soils near river banks.
Systematics
The plant has long confused systematists because it shares its habitus with the tuberous drosera of the Ergaleium section (in which the closest related Drosera subtilis is also classified), but its life cycle, distribution and habitat are more reminiscent of the Drosera indica complex with which it is partly reminiscent socialized grows. The surprise was all the greater when the species turned out to be a member of the Lasiocephala section, the so-called Petiolaris complex.
literature
- Barry J. Conn (Ed.): Handbooks of the Flora of Papua New Guinea. Volume 3. Melbourne University Press, Melbourne 1995, ISBN 0-522-84582-7 , pp. 50-51.
- Ludwig Diels : Droseraceae (= The Plant Kingdom . 26 = 4, 112, ZDB -ID 846151-x ). Engelmann, Leipzig 1906, (Latin and German).
- Allen Lowrie : Carnivorous. Plants of Australia. Volume 3. University of Western Australia Press, Nedlands 1998, ISBN 1-875560-59-9 .
Individual evidence
- ^ Drosera banksii at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
