Vallisneria densiserrulata
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Vallisneria densiserrulata |
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| ( Makino ) Makino |
Vallisneria denseserrulata is a species of plant fromthe frog-bite family (Hydrocharitaceae).
description
The rhizome is upright, 1 to 6 inches long and 4 to 6 millimeters in diameter. The stolons have tiny thorns. The leaves measure 20 to 70 centimeters × 6 to 12 millimeters. There are three leaf veins, the middle of which is covered with tiny thorns. The leaf margin is slightly serrated, the tip blunt or pointed. The male spathe is three-edged, many-flowered and measures 1 to 1.5 centimeters × about 6 millimeters. The sepals are bent back. There are two stamens . The female spathe measures 1.5 to 2 centimeters. Your peduncle is very long and narrow. The sepals measure approx. 3 × 2 millimeters and are pointed. The fruit is triangular-cylindrical. The seeds are not winged.
The number of chromosomes is 2n = 20.
The species blooms and produces fruit from September to October.
Occurrence
Vallisneria denseserrulata grows in rivers and lakes. The species occurs in Japan (Honshu) and in Anhui , Guangdong , Guangxi , Hubei , Liaoning and Zhejiang in the People's Republic of China .
Systematics
Vallisneria denseserrulata was first described in 1914 by Makino Tomitarō as the variety Vallisneria spiralis var. Denseserrulata . In 1921, Makino raised it to the rank of a species.
literature
- Qingfeng Wang, Youhao Guo, Robert R. Haynes, C. Barre Hellquist: Vallisneria denseserrulata. In: Flora of China. Volume 23, pp. 99-100. ( efloras.org ).
Individual evidence
- ↑ Vallisneria denseserrulata at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
- ↑ Rafaël Govaerts (ed.): Vallisneria denseserrulata. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved June 20, 2018.
