Drosera peltata
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Drosera peltata subsp. auriculata , Tasmania |
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| Drosera peltata | ||||||||||||
| Thunb. |
Drosera peltata is a carnivorous plant belonging to the genus sundew ( Drosera ). It was first described in 1797 and is the most widespread tuber-forming sundew species.
description
Drosera peltata is a perennial, herbaceous plant with a height of up to 25 centimeters. Since the habitat of the species is usually exposed to a drought period with great heat in summer, it retreats into a red, spherical tuber with a diameter of up to 8 millimeters at a depth of about six centimeters. After its summer dormancy, it first forms a rosette lying flat on the ground before it grows upwards from its center after two to three months, at the top it occasionally branches out. The roots are poorly developed.
leaves
The species has two different leaf shapes. The leaves of the rosette are up to 16 millimeters long, the thin petiole nearly twelve millimeters long and one millimeter wide, the transversely elliptical, slightly concave leaf blade four millimeters long and eight millimeters wide. The shield-shaped and strongly concave leaf blades standing along the stem axis on up to ten millimeters long leaf stalks have a diameter of three to four millimeters.
blossoms
The species blooms from spring, the inflorescence is a coil , the hairless flower stalks are eight to ten millimeters long. The sepals, which are covered with small glandular hairs, are up to three millimeters long, the inverted egg-shaped, weakly toothed, white petals up to four millimeters long.
Chromosome number
The number of chromosomes is 2n = 32.
distribution
The species is the most widespread of all tuberous drosera, it is found in China, Japan, on the rear Indian peninsula , in front of India , Sri Lanka , Indonesia , in the Philippines , in Australia and in Tasmania .
The large distribution area of Drosera peltata is also related to its relatively high tolerance to different habitats, so the plant can do without the summer dormancy, which is essential for most bulbous Drosera , and colonize permanently moist locations.
Systematics
In addition to the nominate form, numerous other varieties have been described, the subspecies is recognized
- Drosera peltata subsp. auriculata (Backh. ex Planch.) BJConn
There is a high probability of being synonymous with Drosera insolita , which was mistakenly described in the Congo .
literature
- Ludwig Diels : Droseraceae (= The Plant Kingdom . 26 = 4, 112, ZDB -ID 846151-x ). Engelmann, Leipzig 1906, p. 109.
- Allen Lowrie: Carnivorous Plants of Australia. Volume 1. University of Western Australia Press, Nedlands 1987, ISBN 0-85564-253-X .
Individual evidence
- ↑ Drosera peltata at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
