Drosera


Also found in: Dictionary, Thesaurus, Medical, Wikipedia.

Drosera

 

(sundew), a genus of insectivorous plants of the family Droseraceae. The plants are perennial and, less often, annual herbs. They have a creeping or tuberous rhizome and rosettes of round or elongate leaves. The leaves are covered with glandular hairs having a red glandular capitulum that secretes a sticky substance. The hairs, which are easily stimulated, entrap insects. The liquid secreted by the glands contains organic acids and pepsins that decompose the proteins in the captured prey. In this way the plant makes up for the nutrient deficiency characteristic of plants on marshy soils. The pentamerous flowers are solitary or in racemes. The fruit is a dehiscent capsule, which opens along three to five valves.

There are approximately 100 species, distributed in the tropical and temperate zones of both hemispheres. Most of the species are found in Australia and New Zealand. Droserapygmaea, which grows in Tasmania, is the smallest flowering plant. It is 1–2cm tall, and its leaves are approximately 2 mm long. Four species are found in the USSR: D. rotundifolia, D. anglica, D. intermedia, and D. obovata.

References in periodicals archive ?
Ellison and Gotelli (2001) further suggested for annuals (and biannuals such as Drosera brevifolia) the resolution of the prey-pollinator conflict is more crucial and could be resolved by not producing prey attractants.
2012) The digestive fluid of Drosera indica contains a cysteine endopeptidase ("droserain") similar to dionain from Dionaea muscipula.
La familia Droseraceae, conocidas como plantas carnivoras, comprende 4 generos entre los que se encuentra Drosera con 125 especies distribuidas en todo el mundo incluyendo regiones tropicales y tundras, excepto en desiertos y la Antartida (Culham & Gornall 1994).
AYOUR local health store should stock Drosera homoeopathic tablets, 30c potency, which is the alternative.
Drosera Rotundifolia: Deep, hoarse voice with spasmodic, barking cough.
Some genera, such as Drosera, Utricularia, and Pinguicula, are widespread (Juniper et al.
The conservation status of peatland habitats improved on 94 ha (104 patches), including the maintenance of species closely related to peat bogs such as Drosera rotundifolia, Drosera intermedia and Colias palaeno;
Gravel, mainly composed of milky-quartz, is common in the CRs and several plant species such as Drosera schwackei (Diels) Rivadavia are restricted to it (Rivadavia et al.
2009) and the spatial separation of flowers and traps, as has been suggested for species of Drosera and Pinguicula (Juniper et al.
Holocentric chromosomes have been also observed in a few other angiosperm genera (Cuscuta, Pazy and Plitmann, 1994; Drosera, Sheikh and Kondo 1995; Chionographis, Tanaka & Tanaka, 1977 and Myristica, Flach 1966).