Ottelia

Ottelia
	Ottelia alismoides
Systematics
Class :	Bedecktsamer (Magnoliopsida)
	Monocots
Order :	Frog-spoon-like (Alismatales)
Family :	Frog bite family (Hydrocharitaceae)
Subfamily :	Anacharidoideae
Genre :	Ottelia
Scientific name
	Ottelia
	Pers. , 1805

Ottelia (German Ottelie ) is a genus of aquatic plants in the frog-bite family(Hydrocharitaceae)consisting of around 20 species.

description

Ottelia species are perennial, herbaceous freshwater plants. The stem axis is usually thickened like a corm . The leaves are basal, petiolate, and usually divorced at the base. The leaf blade is submerged or sometimes floats on the surface of the water. It is linear to broadly ovate and 3 to 11 veined. The spathe is elliptical to ovate and usually 2 to 6-winged. Its tip is divided into two or three parts.

Ottelia alismoides , flower

The plants have one to many flowers . The flowers are bisexual or unisexual, in the latter case the plants are diocesan . Male flowers usually have a longer flower stalk . Hermaphrodite and feminine flowers are short-stalked and / or have no stem. The sepals are greenish and linear, oblong or ovate. The 3 petals are colored, round to wide, obovate and much longer and wider than the sepals. There are 3 to 15 stamens present. The stamens are linear and flattened. Staminodes are often three present in female flowers, more rarely 2, 1 or they are absent. The ovary consists of 3, 6, 9 or rarely more carpels . The ovules are numerous. Two linear scars are planned for each stylus. The fruits are cylindrical, spindle-shaped or conical. The numerous seeds are small and often hairy. The developing fruit ("water berry") ends up under water after pollination.

Systematics and distribution

The genus Ottelia , named after a Malabar folk name, was established in 1805 by Christian Hendrik Persoon . Synonyms for Ottelia Persoon are Damasonium Schreb. nom. illeg., Beneditaea Toledo , Boottia Wall. , Hymenotheca Salisb. , Oligolobos Gagnep. , Xystrolobos Gagnep.

The genus occurs from tropical to subtropical to temperate areas in Asia, Africa, Australia and South America.

The genus Ottelia includes about 20 species:

Ottelia acuminata (Gagnep.) Dandy : There are five varieties:
- Ottelia acuminata (Gagnep.) Dandy var. Acuminata : It occurs from southern China to Hainan .
- Ottelia acuminata var. Crispa (Handel-Mazzetti) H.Li : This endemic occurs only in Lugu Hu in Yunnan.
- Ottelia acuminata var. Jingxiensis H.Q.Wang & SCSun : This endemic occurs only in Jingxi in Guangxi .
- Ottelia acuminata var. Lunanensis H.Li : This endemic occurs only in Lunan in Yunnan.
- Ottelia acuminata var. Songmingensis Z.T. Jiang, H.Li & ZLDao : It was first described in 2005 from Yunnan .
Ottelia alismoides (L.) Pers. (Syn .: Ottelia japonica Miq. ): It iswidespreadin tropical to subtropical Asia via Malesia to northern Australia. It was introduced into rice fields in southern Europe.
Ottelia balansae (Gagnep.) Dandy : It occurs in Vietnam and in the Chinese provinces of Guangxi, Guizhou and Yunnan.
Ottelia brachyphylla (gherkin) dandy : It occurs in southern Sudan , southern Democratic Republic of the Congo and eastern Tanzania .
Ottelia brasiliensis (Planch.) Walp. : It occurs in Paraguay , Brazil and northeast Argentina .
Ottelia cordata (Wall.) Dandy : It occurs from Bangladesh via Indochina to Hainan .
Ottelia cylindrica (TCEFr.) Dandy : It occurs in the southern Democratic Republic of the Congo, in Angola and in Zambia .
Ottelia emersa Z.C.Zhao & RLLuo : This endemic occurs only in the Guixian in Guangxi.
Ottelia exserta (Ridl.) Dandy : It occurs from Somalia to southern Africa .
Ottelia fischeri (gherkin) dandy : It is found in Kenya , Tanzania, Uganda , Malawi , Mozambique and Zambia.
Ottelia kunenensis ( gherkin ) dandy : It occurs from Angola via Zambia and Namibia to northern Botswana.

Ottelia lisowskii Symoens : It was first described in 2009. It occurs in the southern Democratic Republic of the Congo and in Zambia.

Ottelia mesenterium (Hallier f.) Hartog : It occurs only in Sulawesi .

Ottelia muricata (CHWright) Dandy : It occurs from tropical southern Africa to Namibia.

Ottelia obtusifolia T.CEFr. : It occurs in the southern Democratic Republic of the Congo and northern Zambia.

Ottelia ovalifolia (R.Br.) Rich. : There are two subspecies:

Ottelia ovalifolia subsp. chrysobasis S.WLJacobs : It occurs in northern Australia in the states of Queensland and Western Australia .
Ottelia ovalifolia (R.Br.) Rich. subsp. ovalifolia : It occurs in Australia.

Ottelia profundecordata Symoens : It was first described in 2009. It occurs in the Democratic Republic of the Congo and the Central African Republic .

Ottelia scabra Baker : It occurs in Sudan and Uganda.

Ottelia ulvifolia (Planch.) Walp. ("Sea lettuce leaf Ottelie"): Two subspecies have been described since 2015:

Ottelia ulvifolia subsp. lancifolia (A.Rich.) Symoens : It has been a subspecies since 2015. It is common in tropical western-central Africa and Ethiopia and Angola.
Ottelia ulvifolia (Planch.) Walp. subsp. ulvifolia : It is widespread from Ethiopia and Erithrea to tropical and southern Africa and occurs in Madagascar .

Ottelia verdickii Gürke : It occurs from western Tanzania via the Democratic Republic of the Congo and Zambia to Angola.

supporting documents

Qingfeng Wang, Youhao Guo, Robert R. Haynes, C. Barre Hellquist: Ottelia . In: Flora of China Vol. 23 Hydrocharitaceae , p. 91 u. 95 ( online )

literature

Christel Kasselmann : aquarium plants. Ulmer Verlag, Stuttgart 1995; 2nd, revised and expanded edition 1999, ISBN 3-8001-7454-5 , pp. 392–396 and 466.
Christel Kasselmann: Ottelia Persoon, 1805. In: Claus Schaefer, Torsten Schröer (Hrsg.): The large lexicon of aquaristics. Eugen Ulmer, Stuttgart 2004, ISBN 3-8001-7497-9 , p. 732.

Individual evidence

↑ ^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 Rafaël Govaerts (Ed.): Ottelia. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved October 17, 2017.
↑ Christel Kasselmann: Ottelia alismoides (L.) Persoon, 1753. Ottelia similar to a frog-spoon. In: Claus Schaefer, Torsten Schröer (Hrsg.): The large lexicon of aquaristics. Eugen Ulmer, Stuttgart 2004, ISBN 3-8001-7497-9 , p. 732.
^ Qingfeng Wang, Youhao Guo, Robert R. Haynes, C. Barre Hellquist: Ottelia . In: Flora of China Vol. 23 Hydrocharitaceae , p. 91 u. 95 ( online )

Web links

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

[WCSP-1] ↑ ^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 Rafaël Govaerts (Ed.): Ottelia. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved October 17, 2017.

[2] Christel Kasselmann: Ottelia alismoides (L.) Persoon, 1753. Ottelia similar to a frog-spoon. In: Claus Schaefer, Torsten Schröer (Hrsg.): The large lexicon of aquaristics. Eugen Ulmer, Stuttgart 2004, ISBN 3-8001-7497-9 , p. 732.

[FoC-3] Qingfeng Wang, Youhao Guo, Robert R. Haynes, C. Barre Hellquist: Ottelia . In: Flora of China Vol. 23 Hydrocharitaceae , p. 91 u. 95 ( online )