Dwarf water hose
| Dwarf water hose | ||||||||||||
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Dwarf water hose ( utricularia gibba ) |
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| Utricularia gibba | ||||||||||||
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The dwarf water hose ( Utricularia gibba ) is a species of water hose ( Utricularia ). This carnivorous plant thrives as an aquatic plant worldwide mainly in the tropics and subtropics .
description
Vegetative characteristics
The dwarf-water hose is a one-year or perennial , herbaceous plant with few, pfriemförmigen rhizoids . It forms a few, barely divided, 0.5 to 1.5 cm long leaves on thin stolons . The up to 20 cm long stolons swim freely in open water or lie on the flooded ground as mats. Compared to Utricularia vulgaris, it forms stalked traps, which are characterized by two dorsally located, richly branched appendages. The traps are egg-shaped with a length of 1 to 2.5 mm.
Generative characteristics
The 1 to 30 cm long, upright, racemose inflorescences with one to six flowers are mostly above, rarely below the water surface. The inflorescence stem usually has one, rarely two or no, about 1 mm long scales at about half the height, similar to a bract. The hermaphrodite flower is zygomorphic and five-fold with a double flower envelope . The egg to circular calyx teeth with a length of 1 to 3 mm wide are almost the same. The five yellow petals, often with reddish brown nerves, are 4 to 25 mm long. The crown is two-lipped. The spur is narrow-conical or cylindrical and slightly shorter to significantly longer than the lower lip of the crown. The capsule fruit is rounded.
distribution
Utricularia gibba grows worldwide in the tropics and subtropics . The distribution area radiates northwards to Canada , Spain , Portugal , Israel , China and Japan , southwards to Argentina , South Africa , Australia and New Zealand .
Systematics
The first publication of Utricularia gibba was made in 1753 by Carl Linnaeus in Species Plantarum , 1, p 18 synonyms for Utricularia gibba L. are: Vesiculina gibba (L.) Raf. , Utricularia exoleta R.Br. , Utricularia gibba subsp. exoleta (R.Br.) P.Taylor , Utricularia biflora Lam. Utricularia gibba belongs to the section Utricularia in the subgenus Utricularia within the genus Utricularia .
literature
- Wilhelm Barthlott , Stefan Porembski, Rüdiger Seine, Inge Theisen: Carnivores. Biology and culture of carnivorous plants. Ulmer, Stuttgart 2004, ISBN 3-8001-4144-2 .
- R. Rowe & EA Brown: Utricularia gibba on New South Wales Flora Online from the Royal Botanic Gardens & Domain Trust , Sydney.
Individual evidence
Web links
- Utricularia gibba onthe IUCN 2013 Red List of Threatened Species . Posted by: Anitha, K., 2011. Retrieved September 1, 2013.