Drosera echinoblastus
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Drosera echinoblastus |
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| NGMarchant & Lowrie |
Drosera echinoblastus is a carnivorous plant belonging to the genus sundew ( Drosera ). It belongs to the group of so-called dwarf sundews and is native to southwestern Australia.
description
Drosera echinoblastus is a perennial herbaceous plant . This rosette-forming dwarf sundew reaches a diameter of about 1.5 cm. The stem axis is 5 mm long and only covered with few or no withered leaves from the preseason.
The bud of the stipules is ovate, bristly, 7 mm long and 3 mm in diameter at the base. The stipules themselves are 5 mm long, 4 mm wide and three-lobed. The middle lobe is divided into 3 segments.
The leaf blades are circular and up to 2.5 mm in diameter. The longer tentacle glands are on the edge, the shorter ones on the inside. Glandular hairs can also be seen on the underside. The leaf stalks are up to 5 mm long, 0.8 mm wide at the base and only taper at the very end to 0.4 mm at the leaf blade. They are covered with only a few glandular hairs on the underside.
Flowering time is October to November. The flower stem is up to 12 cm long and has a few glands at the base. Their distribution becomes more and more dense towards the tip. The inflorescence is a coil of 9 to 12 flowers on approximately 2 mm long pedicels. The inverted egg-shaped sepals are 3 mm long and 2 mm wide. The surface is also covered with cylindrically stalked glands. The elongated, orange-colored petals are 9 mm long and 3.5 mm wide, including the wedge-like finger at the base.
The five stamens are 1.1 mm long. The anthers are greenish-white and the pollen are yellow. The pale green ovary is inverted ovoid, 1 mm long and 1 mm in diameter. The 3 yellowish green styluses are 1 mm long under the scar and 0.5 mm long above. The scars are yellowish green, sickle-shaped, 2 mm long and 0.15 mm in diameter, which soon widens to 0.2 mm and then tapers to a rounded end.
The formation of brood scales is typical for dwarf sundews : the approximately egg-shaped, relatively thin brood scales are formed in large numbers from late November to early December and are approx. 1.4 mm long and 1.1 mm wide.
The number of chromosomes is 2n = 20.
Distribution, habitat and status
Drosera echinoblastus occurs only in two locations in the extreme southwest of Australia. In a region on the Hill River north of Cataby and near Cranbrook. The plant thrives there on sandy soils under and between low bushes.
Systematics
The name "echinoblastus" comes from the Greek and means "hedgehog-like, spiky resting bud" (echino = hedgehog-like, prickly; blastus = resting bud). Drosera echinoblastus was described as a species by Allen Lowrie and Neville Graeme Marchant in 1992 .
literature
- Allen Lowrie : Carnivorous Plants of Australia. Volume 2. University of Western Australia Press, Nedlands 1989, ISBN 0-85564-300-5 , p. 46.
Individual evidence
- ↑ Drosera echinoblastus at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
