Rhodamnia

Rhodamnia
	Foliage leaves and flowers of Rhodamnia acuminata
Systematics
	Eurosiden II
Order :	Myrtle-like (Myrtales)
Family :	Myrtle family (Myrtaceae)
Subfamily :	Myrtoideae
Tribe :	Myrteae
Genre :	Rhodamnia
Scientific name
	Rhodamnia
	Turcz.

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

description

Appearance and leaves

Rhodamnia species grow as evergreens, shrubs, or small trees . The constantly against arranged on the branches leaves are divided into petiole and leaf blade. The simple leaf blades have one main and two side nerves or three main nerves starting from the base of the blade and, starting from this, many more or less transverse side nerves. The underside of the leaf is usually covered with white frosting or woolly hair and the upper side of the leaf is bare.

Inflorescences and flowers

The flowers are grouped in several in the leaf axils or in lateral, zymous or racemose inflorescences . The small bracts (Brakteolen) fall off early.

The hermaphroditic flowers are radial symmetry and usually four-fold with a double flower envelope ; only the species Rhodamnia andromedoides on New Caledonia is five-fold. 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 stamens arranged in many circles are curved in the flower bud. The anthers open with longitudinal slits. The ovary below is unicameral and the many ovules are arranged in two parietal placentations. The slender, linear style ends in a shield-shaped (peltaten) or head-shaped scar.

Fruits and seeds

The relatively small, spherical berries have the durable sepals at their upper end 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 hypocotyl and two short cotyledons ( cotyledons ).

Systematics and distribution

The genus Rhodamnia was established 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 took place in AJ Scott: A revision of Rhodamnia (Myrtaceae) , In: Kew Bulletin , Volume 33, Issue 3, 1979, pp 429-433.

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

The distribution area of the genus Rhodamnia includes tropical Asia , New Guinea , Australia (with about 19 species, 18 of which only there) and New Caledonia, the floral regions of Malesia and Melanasia. One focus of biodiversity is Queensland with around 18 species .

Rhodamnia cinerea

Opposite leaves of Rhodamnia maideniana ; the three main nerves are clearly visible.

Opposite leaves of Rhodamnia rubescens

Opposite leaves of Rhodamnia whiteana

There are 20 or 28 or about 40, but as of 2012 about 42 Rhodamnia species:

Rhodamnia acuminata C.T.White : 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 only occurs in the Morobe province in Papua New Guinea . There they were found in a secondary forest at an altitude of about 1465 meters.

Rhodamnia australis A.J.Scott : It occurs in the Northern Territory and Queensland.

Rhodamnia blairiana F. Muell. : It occurs in Queensland. With two varieties.

Rhodamnia cinerea Jack : It is common in Indochina and western Malesia .

Rhodamnia costata A.J.Scott : It occurs in Queensland.

Rhodamnia daymanensis N.Snow : It occurs in Papua New Guinea in the Milne Bay province on the northern slopes of Mount Dayman in the Maneau Mountains in mossy forests over metamorphic rocks at an altitude of about 2250 meters.

Rhodamnia dumetorum (DC.) Merr. & LMPerry : It occurs in Hainan , Indochina and on 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 glauca flower (Syn .: Rhodamnia spongiosa (FMBailey) Domin) , Rhodamnia trinervia var. Spongiosa F.M.Bailey : It occurs from Papua New Guinea to northern and northeastern Queensland.

Rhodamnia hylandii N.Snow : It occurs in northern Queensland.

Rhodamnia kamialiensis N.Snow & WNTakeuchi : It occurs in New Guinea.

Rhodamnia kerrii J. Parn. & NicLugh. : It comes in the northeastern Thailand before

Rhodamnia lancifolia A.J.Scott : It occurs in Papua New Guinea .

Rhodamnia latifolia (Benth.) Miq. : It occurs on Maluku and the Bismarck Archipelago .

Rhodamnia longisepala N.Snow & AJFord : It occurs in Queensland.

Rhodamnia maideniana C.T.White : It occurs in New South Wales and Queensland.

Rhodamnia makumak N.Snow : It is only known from the Milne Bay province in Papua New Guinea from rainforests on a plateau at an altitude of 350 meters.

Rhodamnia moluccana Burret : It occurs on the Moluccas and the Bismarck Archipelago.

Rhodamnia mulleri (Korth.) Blume : It occurs on Borneo .

Rhodamnia novoguineensis A.J.Scott : It occurs in Papua New Guinea and perhaps in Queensland.

Rhodamnia pachyloba A.J.Scott : It occurs on Maluku and western New Guinea.

Rhodamnia parviflora A.J.Scott : It occurs in western New Guinea.

Rhodamnia pauciovulata Guymer : It occurs in Queensland.

Rhodamnia reticulata A.J.Scott : It occurs in western New Guinea.

Rhodamnia rubescens (Benth.) Miq. : It occurs in New South Wales and Queensland.

Rhodamnia sepicana Diels : It comes from Maluku and the Solomon Islands .

Rhodamnia sessiliflora Benth. : It occurs in Queensland.

Rhodamnia sharpeana N.Snow : It occurs in New Guinea and Queensland.

Rhodamnia tessellata Steenis ex AJScott : It occurs in Sumatra.

Rhodamnia toratot N.Snow : It is only known from a secondary forest in the Milne Bay province in Papua New Guinea.

Rhodamnia uniflora (Ridl.) Burkill : It occurs on the Malay Peninsula and Borneo.

Rhodamnia waigeoensis N.Snow : The species first described in 2012 occurs only on the Indonesian island of Waigeo .

Rhodamnia whiteana Guymer & Jessup : It occurs in Queensland.

swell

Jie Chen & Lyn A. Craven: Myrtaceae : Rhodamnia , p. 330 - same text online as the 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 classification)
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.

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j Neil Snow: Five new species of Rhodamnia (Myrtaceae, Myrteae) from New Guinea , In: PhytoKeys , Volume 19, December 28, 2012, pp. 31-49. doi : 10.3897 / phytokeys.19.4098 .
↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m Jie Chen & Lyn A. Craven: Myrtaceae : Rhodamnia , p. 330 - online with the same text as the 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
↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j Peter G. Wilson: Entry in the New South Wales Flora Online .
↑ Entry in Tropicos . last accessed on January 1, 2013
^ ^A ^b Rhodamnia in the Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland. last accessed on January 1, 2013
^ AJ Scott: A revision of Rhodamnia (Myrtaceae) , In: Kew Bulletin , Volume 33, Issue 3, 1979, pp. 429-433: JSTOR 4110145 .
↑ ^a ^b ^c Entry in Australian Plant Name Index = APNI. last accessed on January 1, 2013
^ Neil Snow: Systematics of the Australian species of Rhodamnia (Myrtaceae) , In: Systematic Botany Monographs , Volume 82, 2007, pp. 16-17.
↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ ^o ^p ^q ^r ^s ^t ^u ^v ^w ^x ^y ^z ^aa ^ab ^ac ^ad ^ae ^af ^ag ^ah ^ai Rafaël Govaerts (ed.): Rhodamnia. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved May 2, 2020.

Web links

Commons : Rhodamnia - collection of images, videos and audio files

[Snow2012-1] ↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j Neil Snow: Five new species of Rhodamnia (Myrtaceae, Myrteae) from New Guinea , In: PhytoKeys , Volume 19, December 28, 2012, pp. 31-49. doi : 10.3897 / phytokeys.19.4098 .

[FoC-2] ↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m Jie Chen & Lyn A. Craven: Myrtaceae : Rhodamnia , p. 330 - online with the same text as the 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

[NSWFo-3] ↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j Peter G. Wilson: Entry in the New South Wales Flora Online .

[tropicos-4] Entry in Tropicos . last accessed on January 1, 2013

[GRIN-5] A ^b Rhodamnia in the Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland. last accessed on January 1, 2013

[Scott1979-6] AJ Scott: A revision of Rhodamnia (Myrtaceae) , In: Kew Bulletin , Volume 33, Issue 3, 1979, pp. 429-433: JSTOR 4110145 .

[APNI-7] Entry in Australian Plant Name Index = APNI. last accessed on January 1, 2013

[Snow2007-8] Neil Snow: Systematics of the Australian species of Rhodamnia (Myrtaceae) , In: Systematic Botany Monographs , Volume 82, 2007, pp. 16-17.

[WCSP-9] ↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ ^o ^p ^q ^r ^s ^t ^u ^v ^w ^x ^y ^z ^aa ^ab ^ac ^ad ^ae ^af ^ag ^ah ^ai Rafaël Govaerts (ed.): Rhodamnia. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved May 2, 2020.