Drosera ordensis
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Drosera ordensis |
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| Lowrie |
Drosera ordensis is a carnivorous plant fromthe sundew family (Droseraceae). It occurs exclusively in a small area in the northern Australian Northern Territory .
description
In Drosera ordensis is perennial herbaceous plants , the clumps is down to earth rosettes. The leaves are pressed flat against the earth until they point upwards, the leaf stalks densely covered with long, woolly, white hairs on both sides are inverted-lanceolate, 35 to 50 millimeters long at flowering time (later larger), 0.5 to 1 millimeter wide on Base 2 to 4 millimeters wide at the tip and tapered to 0.8 to 1 millimeter wide at the base of the blade . The approximately round leaf spreads are 3 to 4 millimeters long, 3.5 to 5 millimeters wide, their upper side is covered with slightly longer, centrally shorter catching tentacles, their underside is densely covered with long, woolly, white hair.
The inflorescence axes, densely covered with long, woolly, white hairs are 20 to 45 centimeters long and carry numerous flowers in a cluster , the flower stalks are 3 to 12 millimeters long and stand upright when ripe. The sepals are inverted ovate, 2.5 to 5 millimeters long and 1.2 to 3 millimeters wide. The petals are colored in numerous shades from pink to violet to almost white, with a strongly pronounced central rib, inversely ovoid and 7 to 10 millimeters long and 3.5 to 6 millimeters wide.
The stamens are 3.5 to 4 millimeters long. The ovary is twisted, 1 to 1.5 millimeters long, 1.5 to 1.7 millimeters in diameter at flowering time and with three two-lobed carpels . The three styles are often forked, 2.7 to 3 millimeters long and end in narrow, egg-shaped scars .
The number of chromosomes is 2n = 24.
Distribution and location
Drosera ordensis is native to the greater area around 50 kilometers around Kununurra ( Western Australia , Northern Territory ) in the tropical north of Australia , where it grows in savannahs on sandy soils made of sandstone under sorghum species that provide light shading. Drosera ordensis is found there mainly in depressions or on large rock formations that remain moist until the dry season. With the extremely thick hairs, the plants collect condensing moisture and morning dew to meet their fluid needs.
Systematics
The closest related species is Drosera lanata . The type epithet refers to the Ord River , where Drosera ordensis was first found in 1951 . However, it was first described in 1994 by Allen Lowrie based on a find from 1988. The species belongs to the so-called "Petiolaris complex", which forms the Lasiocephala section of the genus.
photos
inflorescence
blossom
Top view
Sheet (detail)
literature
- Allen Lowrie: Drosera ordensis (Droseraceae), a new tropical species of carnivorous plant from northern Australia. In: Nuytsia. Vol. 9, No. 3, 1994, ISSN 0085-4417 , pp. 363-367 .
Individual evidence
- ↑ Drosera ordensis at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
