Drosera spatulata
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Drosera spatulata is a carnivorous plant of the genus sundew (Drosera) and wasfirst describedin 1904 by Jacques Julien Houtton de La Billardière .
description
A flat, native rosette with a diameter of about 1.5 to 5 centimeters and spatulate leaves characterize the appearance of this carnivorous plant . It is quite variable in appearance and exists in different subspecies, so that it is sometimes wrongly determined. The pink or white flower grows on a flower stalk about 20 centimeters long.
The number of chromosomes is 2n = 20, 40 or 60.
distribution
The plant is widespread - from Japan , Korea , Taiwan , Southeast China via Borneo , Papua New Guinea and the Philippines to Southeast Australia , Tasmania and New Zealand as well as Micronesia . Drosera spatulata is quite undemanding in terms of climate - it occurs from temperate to subtropical to tropical climates.
Multiplication
Some forms occur in areas with a short growing season or changeable climate. These are genetically adapted to this in that they grow relatively quickly and bloom very small. It often only takes half a year from the germinating seed to the fully grown, flowering plant.
Systematics
Of the numerous forms, the following have been described and are generally recognized:
- Drosera spatulata var. Bakoensis A. Fleischm. & Chi.C. Lee : rounded to spatulate leaves, smaller inflorescences with fewer flowers and larger, pale pink petals. The plants are only 15-20 mm in diameter and are short-lived. They only occur in the Bako National Park on Borneo , where they are separated from the nearest occurrence of the species by about 1050 km.
- Drosera spatulata var. Gympiensis R.A. Gibson & I.Snyder : small, hairy inflorescences with fewer flowers, but larger, dark pink petals. It occurs on the Australian coast between Gympie and Fraser Island .
- Drosera spatulata var. Spatulata : occurs in the entire distribution area and is very variable. In the area from Japan to Tasmania there are forms with elongated, spatulate to wedge-shaped leaves on short petioles, on New Zealand the leaves are rounded on long petioles.
- Drosera × tokaiensis ( Komiya & Shibata ) T.Nakam. & K.Ueda : occurs in Japan and is a hexaploid species of hybrid origin. The parents were a tetraploid D. spatulata and a diploid D. rotundifolia . F1 triploid hybrids have also been found. The leaves are more rounded and larger than all varieties with a similar leaf shape. The flowers are pink.
The taxonomic classification of many other forms is unclear. One speaks therefore of a Drosera spatulata complex, which also includes the closely related species Drosera oblanceolata , Drosera ultramafica and Drosera neocaledonica . The hybrid Drosera oblanceolata x spatulata is widespread around Hong Kong , where both species grow.
Drosera spatulata var. Bakoensis , Sarawak
Drosera spatulata in Mutsuzawa, Chiba , Japan
Drosera tokaiensis , Toyohashi , Aichi Prefecture, Japan.
literature
- Ludwig Diels : Droseraceae (= The Plant Kingdom . 26 = 4, 112, ZDB -ID 846151-x ). Engelmann, Leipzig 1906, (The book contains the most important monograph of the Drosera genus .).
- Wilhelm Barthlott , Stefan Porembski, Rüdiger Seine, Inge Theisen: Carnivores. Biology and culture of carnivorous plants. Eugen Ulmer GmbH & Co., Stuttgart 2004, ISBN 3-8001-4144-2 .
Individual evidence
- ↑ Drosera spatulata at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
- ^ Andreas Fleischmann, Ch'ien C. Lee: A new variety of Drosera spatulata (Droseraceae) from Sarawak, Borneo . In: International Carnivorous Plant Society (ed.): Carnivorous Plant Newsletter . tape 38 , no. 1 , 2009, p. 4-9 ( carnivorousplants.org [PDF]).
- ↑ Drosera spatulata Species Complex | ICPS. Retrieved October 9, 2018 .