Rhodomyrtus

Rhodomyrtus tomentosa

Rhodomyrtus is a genus of flowering plants in the myrtle family ( Myrtaceae ). The approximately 23 species occur in tropical Asia, New Guinea, Australia, New Caledonia and Fiji.

  • 3.1 Notes and references

Description

Appearance and leaves

Rhodomyrtus species grow as evergreen shrubs or trees. The constantly against arranged on the branches leaves are divided into petiole and leaf blade. The simple leaf blades often have the Spreitenbasis starting three main nerves.

Inflorescences and flowers

The flowers appear singly in the leaf axils or threes to eleventh together in pendent, zymösen or racemose inflorescences.

The hermaphrodite flowers are radial symmetry and four or fünfzählig double perianth. The ovate to halbkugeligeBlütenbecher ( hypanthium ) dominates the upper end of the ovary and is not to hardly fused with this. The four or five free, leathery sepals are durable. The four free petals are larger than the sepals. The colors of the petals ranging from white to pink to red. The numerous arranged in three to six circles free stamens are usually shorter than the petals. The anthers open longitudinally. Three or four carpels are fused to a constant under one-to vierkammerigen ovary. The many ovules are arranged in two rows mostly in central angle constant or rarely parietal placentation. The slim, linealische style ends in a capitate or shield-shaped ( peltaten ) scar.

Fruit and seeds

The dry or fleshy, ovoid, spherical or flask-shaped berries have at its upper end the tough sepals and contain few to many seeds, which are separated by a false septum. The flat, kidney-shaped seeds have a hard seed coat ( testa) and contain a curved or spirally - twisted embryo with a long hypocotyl and two very small cotyledons ( cotyledons ).

Systematics and distribution

The genus Rhodomyrtus 1841 was established by Ludwig Reichenbach in The German botanist herbarium, Volume 1, page 177. Basionym is Myrtus sect. Rhodomyrtus DC., Which was published in 1828 by Augustin- de Candolle Pyrame in Prodromus systematis Naturalis Regni Vegetabilis, Volume 3, p 240. As Lectotypusart 1956 by R. McVaugh in Taxon, Volume 5, pp. 145 Rhodomyrtus tomentosa ( Aiton ) Hassk. determined. Synonyms for Rhodomyrtus ( DC.) Rchb. are Cynomyrtus Scriv. and Psidiomyrtus Guillaumin. A Isonym is Rhodomyrtus ( DC.) Hassk. , It was published by JC Hasskarl in flora or General Botanical newspaper, Volume 25 ( 2), 1842, pp. 35. The last revision of the genus Rhodomyrtus performed by AJ Scott: A revision of Rhodomyrtus ( Myrtaceae ), in Kew Bulletin, Volume 33, Issue 2, 1978, pp. 311-312.

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

The distribution of the genus Rhodomyrtus which includes tropical Asia, New Guinea, the Australian states of New South Wales and Queensland, New Caledonia and Fiji. New Guinea is at least eleven species, the focus of biodiversity. Rhodomyrtus tomentosa is in many tropical and marginal tropical areas, such as Florida and Hawaii, an invasive plant.

There are 22 to 23 ( as of 2010) Rhodomyrtus types:

  • Rhodomyrtus canescens CTWhite & Francis: It occurs only in the north-eastern Queensland.
  • Rhodomyrtus effusa Guymer: It is native to Queensland.
  • Rhodomyrtus elegans ( flower) AJScott: It occurs to Maluku and Papua New Guinea.
  • Rhodomyrtus guymeriana N.Snow & JPAtwood: It occurs in Papua New Guinea.
  • Rhodomyrtus kaweaensis N.Snow: It occurs in Papua New Guinea.
  • Rhodomyrtus lanata Guymer: It occurs in Papua New Guinea.
  • Rhodomyrtus locellata ( Guillaumin ) burret: It occurs in New Caledonia.
  • Rhodomyrtus longisepala N.Snow & J.McFadden: It occurs in Papua New Guinea.
  • Rhodomyrtus macrocarpa Benth. It occurs in New Guinea and northern and north-eastern Queensland.
  • Rhodomyrtus mengenensis N.Snow: It occurs in Papua New Guinea.
  • Rhodomyrtus misimana N.Snow: It occurs in Papua New Guinea.
  • Rhodomyrtus montana Guymer: It occurs in western New Guinea.
  • Rhodomyrtus novoguineensis Diels: It comes from Maluku prior to the Bismarck Archipelago.
  • Rhodomyrtus obovata CTWhite: It occurs in Papua New Guinea.
  • Rhodomyrtus pervagata Guymer: It is native to Queensland.
  • Rhodomyrtus pinnatinervis CTWhite: It comes from New Guinea prior to the Bismarck Archipelago.
  • Rhodomyrtus psidioides ( G.Don ) Benth. It comes from southeastern Queensland to New South Wales before.
  • Rhodomyrtus salomonensis ( CTWhite ) AJScott: It occurs in the Solomon Islands.
  • Rhodomyrtus sericea burret: It is native to northern Queensland.
  • Rhodomyrtus surigaoensis Elmer: It is located on the Philippine island of Mindanao.
  • Rhodomyrtus takeuchii N.Snow & J.Cantley: This type described in 2010 in Harvard Pap bot, Volume 15, pp. 66 occurs in Papua New Guinea.
  • Rhodomyrtus tomentosa ( Aiton ) Hassk. It is widespread in Sri Lanka, India, Myanmar, Laos, Cambodia, Vietnam, China, Malaysia, Indonesia, the Philippines and the Japanese Ryukyu Islands.
  • Rhodomyrtus trineura ( F.Muell. ) Benth. It comes from Maluku to Queensland before.

Swell

  • Jie Chen & Lyn A. Craven: Myrtaceae: Rhodomyrtus, 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, Jessie McFadden & Joshua P. Atwood: Three new species of Rhodomyrtus ( DC.) Rchb. ( Myrtaceae ) from Papua New Guinea, Austrobaileya, Volume 7, 2008, pp. 691-706: Full text PDF.
Augustin Pyramus de Candolle Ovary (botany) Berry testa (botany) Cereal germ Maluku (province) Agricultural Research Service
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