Halophila

Halophila stipulacea

Halophila is a plant genus in the family of the frog bite plants ( Hydrocharitaceae ).

Description

Vegetative characteristics

Halophila species are perennial, herbaceous, live in salt water, submerged plants. The shoot axis is narrow, branched, creeping and breaks apart easily. It is rooted in their nodes. Each node has two scales. The leaves are mostly opposite. They are stalked and entire or serrated.

Generative features

Halophila species may be getrenntgeschlechtig dioecious ( dioecious ) or monoecious ( monoecious ). The submerged inflorescences are more or less sedentary or possess in male inflorescences Blütenstandsschäfte. The inflorescences are covered by a two-part spathe and most flowered. The unisexual flowers are triple. There are three sepals present. Petals absent. The three free stamens stand between the sepals, so it lacks the outer stamen circle. The stamens are tiny. The linealischen to spindle- shaped anthers have two to four counters and are bent outward. The pollen is shaped like a string of pearls. The female flowers are sessile or nearly sessile. The unilocular ovary has a terminal beak. This is extended to the top in three tiny cloth. There are two available to numerous ovules. The rarely two, usually three to five pens are thready. The fruits have at its tip to a beak. The pericarp is membranous. The few to many seeds are round or almost round.

Occurrence

Halophila occurs on the coast of the western Indian Ocean and the southern Pacific Ocean.

System

The genus Halophila was erected in 1806 by Louis Marie Aubert Du Petit Thouars.

The genus includes the following species:

  • Halophila australis Doty & B.C.Stone
  • Halophila baillonis Asch. ex Dickie
  • Halophila beccarii Asch.
  • Halophila Capricorni Larkum
  • Halophila decipiens Ostenf.
  • Halophila engelmannii Asch.
  • Halophila gaudichaudii J.Kuo
  • Halophila hawaiiana Doty & B.C.Stone
  • Halophila japonica M.Uchimura & E.J.Faye
  • Halophila major (inch ) Miq.
  • Halophila mikii J.Kuo
  • Halophila minor (inch ) Hartog
  • Halophila nipponica J.Kuo
  • Halophila okinawensis J.Kuo
  • Halophila ovalis ( R.Br. ) Hook.f. Halophila ovalis subsp. ovalis
  • Halophila ovalis subsp. bullosa ( Setch. ) Hartog
  • Halophila ovalis subsp. linearis ( Hartog ) Hartog
  • Halophila ovalis subsp. ramamurthiana K.Ravik. & R.Ganesan

Documents

  • Qingfeng Wang, Youhao Guo, Robert R. Haynes, C. Barre Hellquist: Halophila. In: Flora of China Vol 23 Hydrocharitaceae, pp. 91 and 98 ( online)
  • Robert R. Haynes: Hydrocharitaceae, In: Flora of North America Editorial Committee ( eds.): Flora of North America North of Mexico, Volume 22 - Magnoliophyta: Alismatidae, Arecidae, Commelinidae ( in part), and Zingiberidae, Oxford University Press, New York and others, 2000, ISBN 0-19-513729-9. Halophila - text Registered as printed work.
  • Entry in the Flora of Pakistan.
Ovary (botany)
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