Rhodamnia

Leaves and flowers of Rhodamnia acuminata

Rhodamnia is a genus of flowering plants in the myrtle family ( Myrtaceae ). The approximately 42 species occur in tropical Asia, New Guinea, Australia and New Caledonia.

  • 3.1 Notes and references

Description

Appearance and leaves

Rhodamnia species grow as evergreen shrubs or small trees. The constantly against arranged on the branches leaves are divided into petiole and leaf blade. The simple leaf blades have the Spreitenbasis starting a main building and two lateral nerves or three main nerves and assuming many more or less transverse lateral nerves. The lower leaf surface is usually frosted white or woolly hairs and the leaf surface is bare.

Inflorescences and flowers

The flowers are a plurality in the leaf axils or in pendent, zymösen or racemose inflorescences. The small bracts ( Brakteolen ) fall off early.

The hermaphrodite flowers are radial symmetry and usually cruciform with a double perianth; only the type Rhodamnia andromedoides on New Caledonia is fünfzählig. The hemispherical flower cup ( hypanthium ) is fused with the ovary. The four free sepals are durable. The four free petals are obovate to more or less circular and longer than the sepals. The numerous arranged in many circles stamens are incurved in the bud. The anthers open by longitudinal slits. The ovary is under permanent single chamber and the many ovules are arranged two parietal placenta TION. The slim, linealische style ends in a shield-shaped ( peltaten ) or capitate stigma.

Fruit and seeds

The relatively small, globular berries have at their upper end, the durable sepals and contain few seeds. The more or less spherical to kidney-shaped seeds have a hard seed coat and contain a horseshoe-shaped embryo with a long and two short hypocotyl cotyledons ( cotyledons ).

Systematics and distribution

The genus Rhodamnia was erected in 1822 by William Jack in Malayan Miscellanies, Volume 2 ( 7), p 48. Type species is Rhodamnia cinerea Jack. Synonyms for Rhodamnia Jack are Monoxora Wight and Opanea Raf .. The last revision of the genus Rhodamnia was in AJ Scott: A revision of Rhodamnia ( Myrtaceae ), In: Kew Bulletin, Volume 33, Issue 3, 1979, pp. 429-433.

The genus belongs to the tribe Rhodamnia Myrteae in the subfamily Myrtoideae within the Myrtaceae family.

The distribution of the genus covers Rhodamnia with tropical Asia, New Guinea, Australia ( with about 19 species, of which 18 are only there) and New Caledonia, the piles and areas of Malaysia's Melanasien. One focus of biodiversity, with about 18 species of Queensland.

There are (20 to 28 or up ) So far, around 34, but since 2012 about 42 Rhodamnia types:

  • Rhodamnia acuminata CTWhite: It occurs in Queensland.
  • Rhodamnia andromedoides Guillaumin: It occurs in New Caledonia.
  • Rhodamnia angustifolia N.Snow & Guymer: It occurs in Queensland.
  • Rhodamnia arenaria N.Snow: It occurs in Queensland.
  • Rhodamnia argentea Benth. It occurs in New South Wales and Queensland.
  • Rhodamnia asekiensis N.Snow: It comes only in the province of Morobe in Papua New Guinea. There they were found in a secondary forest at an altitude of about 1465 meters.
  • Rhodamnia australis AJScott: It occurs in the Northern Territory and Queensland.
  • Rhodamnia blairiana F.Muell. It occurs in Queensland.
  • Rhodamnia cinerea Jack: It is distributed in Indo-China and western Malaysia's.
  • Rhodamnia costata AJScott: It occurs in Queensland.
  • Rhodamnia daymanensis N.Snow: It comes in Papua New Guinea in Milne Bay Province, on the northern slopes of Mount Dayman in the Maneau mountains in mossigen forests over metamorphic rock at an altitude of about 2250 meters in front.
  • Rhodamnia dumetorum ( DC.) Merr. & LMPerry: It occurs in Hainan, Indochina and the island of Langkawi.
  • Rhodamnia dumicola Guymer & Jessup: It occurs in Queensland.
  • Rhodamnia fordii N.Snow: It occurs in Queensland.
  • Rhodamnia glabrescens Guymer & Jessup: It occurs in Queensland.
  • Rhodamnia hylandii N.Snow: It occurs in Queensland.
  • Rhodamnia kamialiensis N.Snow & WNTakeuchi: It occurs in New Guinea.
  • Rhodamnia kerrii J.Parn. & NicLugh. It occurs in northeastern Thailand.
  • Rhodamnia lancifolia AJScott: It occurs in Papua New Guinea.
  • Rhodamnia latifolia ( Benth. ) Miq. It occurs in Maluku and the Bismarck Archipelago.
  • Rhodamnia longisepala N.Snow & AJFord: It occurs in Queensland.
  • Rhodamnia maideniana CTWhite: It occurs in New South Wales and Queensland.
  • Rhodamnia moluccana burret: It occurs to Maluku and the Bismarck Archipelago.
  • Rhodamnia makumak N.Snow: You are known only from Milne Bay Province in Papua New Guinea from rain forests on a plateau at an altitude of 350 meters.
  • Rhodamnia mulleri ( Korth. ) flower: It occurs on Borneo.
  • Rhodamnia novoguineensis AJScott: It occurs in Papua New Guinea and perhaps in Queensland.
  • Rhodamnia pachyloba AJScott: It occurs to Maluku and Western New Guinea.
  • Rhodamnia parviflora AJScott: It occurs in western New Guinea.
  • Rhodamnia pauciovulata Guymer: It occurs in Queensland.
  • Rhodamnia reticulata AJScott: It occurs in western New Guinea.
  • Rhodamnia rubescens ( Benth. ) Miq. It occurs in New South Wales and Queensland.
  • Rhodamnia sepicana Diels: It comes on Maluku and the Solomon Islands.
  • Rhodamnia sessiliflora Benth. It occurs in Queensland.
  • Rhodamnia sharpeana N.Snow: It occurs in New Guinea and Queensland.
  • Rhodamnia spongiosa ( FMBailey ) Domin ( Syn: Rhodamnia trinervia var spongiosa FMBailey, Rhodamnia glauca flower): It occurs in Papua New Guinea and Queensland.
  • Rhodamnia toratot N.Snow: You are known only from Milne Bay Province in Papua New Guinea from a secondary forest.
  • Rhodamnia tessellata Steenis ex AJScott: It occurs to Sumatera.
  • Rhodamnia uniflora ( Ridl. ) Burkill: It occurs on the Malay Peninsula and Borneo.
  • Rhodamnia waigeoensis N.Snow: It occurs only on the Indonesian island Waigeo.
  • Rhodamnia whiteana Guymer & Jessup: It occurs in Queensland.

Swell

  • Jie Chen & Lyn A. Craven: Myrtaceae: Rhodamnia, pp. 330 - text the same online as printed work, In: Wu Zheng -yi, Peter H. Raven & Deyuan Hong (eds.): Flora of China, Volume 13 - Clusiaceae through Araliaceae, Science Press and Missouri Botanical Garden Press, Beijing and St. Louis, 2007. ISBN 978-1-930723-59-7 (Section Description and systematics)
  • Peter G. Wilson: Entry in the New South Wales Flora Online. (Section Description and systematics)
  • Neil Snow: Systematics of the Australian species of Rhodamnia ( Myrtaceae ), In: Systematic Botany Monographs, Volume 82, 2007, pp. 16-17.
Ovary (botany) Berry Cereal germ Malesia Maluku (province) Digital Object Identifier Agricultural Research Service
680742
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