Drosera prolifera
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Drosera prolifera is a species of sundew ( Drosera ) within the sundew family(Droseraceae). This carnivorous plant is native to only four spatially limited areas in the northeast of the Australian state of Queensland .
description
Vegetative characteristics
Drosera prolifera is a terrestrial , perennial and herbaceous plant with fibrous roots , the main stem of the plant is about 1–2 cm high. Up to 15 leaves stand together in basal rosettes . The leaf stalks are 15–45 mm long. The kidney-shaped leaf blades have a diameter of 10 to 20 mm. The relatively short tentacles secrete a strong glue, the production of which apparently consumes a lot of energy: The nightly oxygen consumption of the tentacles exceeds that of the leaf blades by a factor of seven. The formation of unusually large-format spindles (as is the case with Dr. schizandra and Dr. adelae ) gives the species certain advantages: by leaching out its own dying leaves, the plant recovers important nutrients.
So-called kindels ( clones of the mother plant) often grow from older leaves, which lie on the ground after a while . The plant also forms stolons (such as strawberries ) and root runners, from which new young plants identical to the mother plant also form.
Generative characteristics
Drosera prolifera blooms all year round. The up to four inflorescences are about 10-18 cm high and carry 4-8 flowers. The bracts are linear and 1–2 mm long, the sepals 3.5–4 mm long are lanceolate. The flower stalks are 3–5 mm long. The reddish-purple petals are ovate and 2.5-3 mm long.
After flowering, the inflorescences sink to the ground and within a few weeks complete clones of the mother plant emerge from the flowers, similar to the stolons ( false viviparity ).
Chromosome number
The number of chromosomes is 2n = 30.
Distribution and systematics
Drosera prolifera was first described by Cyril Tenison White in 1940 . Their distribution area is limited to the places Thornton Peak , Noah Creek and the flanks of the Roaring Meg waterfalls in north Queensland , as well as at Cape York . There the plant grows on the banks of streams and forms real carpets there. But it also grows on rocks in the local rainforests . The locations are under nature protection and are protected from large-scale clearing . In total, only four small populations are known, but their total size is unknown.
Drosera prolifera is considered "endangered". The threat to this rare species comes mainly from illegal collection.
etymology
The name extension prolifera comes from the Latin words proles (descendants) and ferre (to carry). It is a reference to the ability of the plant to create cuttings on the inflorescences.
literature
- Wilhelm Barthlott , Stefan Porembski, Rüdiger Seine, Inge Theisen: Carnivores. Biology and culture of carnivorous plants. Eugen Ulmer, Stuttgart 2004, ISBN 3-8001-4144-2 .
- Janek von Byern, Ingo Grunwald (eds.): Biological Adhesive Systems. From Nature to Technical and Medical Application. Springer, Vienna a. a. 2011, ISBN 978-3-7091-0141-4 .
- Hans Lambers, Timothy D. Colmer (Ed.): Root physiology. From gene to function (= Plant Ecophysiology. 4). Springer, Dordrecht a. a. 2005, ISBN 1-4020-4098-9 .
- Barry A. Rice: Growing carnivorous plants. Timber Press, Portland OR 2006, ISBN 0-88192-807-0 .
Individual evidence
- ↑ a b c d Information on Drosera prolifera (PDF; 40 kB)
- ↑ Janek von Byern, Ingo Grunwald (ed.): Biological Adhesive Systems. 2011, p. 22.
- ↑ Hans Lambers, Timothy D. Colmer (Ed.): Root physiology. 2005, p. 135.
- ^ A b Barry A. Rice: Growing carnivorous plants. 2006, p. 91.
- ^ A b Richard Nunn, Greg Bourke: An account of Drosera section Prolifera . In: International Carnivorous Plant Society (Ed.): Carnivorus Plants Newsletter . tape 46 , no. 3 , September 2017, p. 95-96 ( carnivorousplants.org [PDF]).
- ↑ Drosera prolifera at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
Web links
- Information on Drosera prolifera (English; PDF; 40 kB)