Lankesterella
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Lankesterella gnomus |
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| Scientific name | ||||||||||||
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| Ames |
Lankesterella is a genus from the family of the orchid (Orchidaceae). It consists of eleven types of herbaceous plants that are native to tropical America.
description
The Lankesterella species are very small, evergreen, epiphytic plants. The slender, cylindrical roots are fleshy and hairy. The leaves stand tightly in a rosette. They are elliptical to lanceolate in shape, pointedly ending, wedge-shaped at the base or merging into a leaf stalk furrowed on the top. They are glossy green, ciliate on the edge.
The terminal, racemose , hairy inflorescence is erect or slightly arching overhanging, it has no bracts . The few flowers are loosely and one-sided on the inflorescence. The flowers are relatively large in relation to the plant, their color is white and green. The ovary is sessile or very short-stalked, spindle-shaped, somewhat hairy. The sepals are hairy on the outside, spread out or inclined to form a tube. The dorsal sepal is partially fused with the column. The lateral sepals form a bulge or a spur with the base of the column . The lower half of the petals adhere to the dorsal sepal, the front half is free. The lip is not narrowed at the base, with the lateral sepals and the column base it forms a nectarium . The column is rather short, slightly curved, it protrudes clearly beyond the point of attachment at the ovary ("column foot"). The scar consists of two surfaces that can be close together or connected. The stamen is oval-hood-shaped, it ends pointed, the stamen is clearly recognizable, but fused with the tissue of the column (clinandrium). The column often forms two slightly pointed staminodes on the side of the stamen . The pollinia are narrow, club-shaped with a distinct, oval viscidium (adhesive disc). The separating tissue between the stamen and stigma (rostellum) is narrowly triangular, it ends with a point. In some species, self-pollination is the rule: here the rostellum is missing, the stigma is at the end of the column in direct proximity to the stamen.
Occurrence
Lankesterella occurs in the Caribbean, Central America (Costa Rica and Panama) and South America along the Andean chain and then again in southeastern Brazil. The species occur at altitudes up to 2700 meters. The locations are in the shade of ever-moist forests, where the plants grow epiphytically on the trunk and on the lower branches.
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Systematics and botanical history
Lankesterella is classified within the tribe Cranichideae in the subtribe Spiranthinae . A closely related genus is Eurystyles . Above all, vegetative features connect these genera, while details of the flower are different.
The genus Lankesterella was described by Oakes Ames in 1923 . The name honors Charles Herbert Lankester (1879–1969), an (English) Costa Rican naturalist and botanist. The type species at Ames was Lankesterella costaricensis , which is regarded as a synonym of Lankesterella orthantha .
The following species are included in Lankesterella :
- Lankesterella alainii Nir : It occurs from Cuba to Hispaniola.
- Lankesterella caespitosa (Lindl.) Hoehne : It occurs in Venezuela and Brazil.
- Lankesterella ceracifolia ( Barb . Rodr .) Mansf. (Syn .: Lankesterella mentiens Hoehne ): It occurs from Brazil to northeast Argentina and Venezuela.
- Lankesterella glandula Ackerman : It occurs only in the Dominican Republic.
- Lankesterella gnomus (Kraenzl.) Hoehne : It occurs in southeastern Brazil.
- Lankesterella longicollis (Cogn.) Hoehne : It occurs in Brazil.
- Lankesterella orthantha (Kraenzl.) Garay (Syn .: Lankesterella costaricensis Ames ): It occurs in Costa Rica, Colombia, Ecuador, Peru and Venezuela.
- Lankesterella parvula (Kraenzl.) Pabst : It occurs in Brazil.
- Lankesterella pilosa (Cogn.) Hoehne : It occurs in Brazil.
- Lankesterella salehi Pabst : It occurs in southeastern Brazil.
- Lankesterella Spannageliana (Hoehne & Brade) Mansf. : It occurs in the Brazilian state of Rio de Janeiro.
supporting documents
Most of the information in this article comes from:
- Leslie A. Garay: 225 (1). Orchidaceae (Cypripedioideae, Orchidoideae and Neottioideae) . In: Gunnar Harling, Benkt Sparre (ed.): Flora of Ecuador . tape 9 , 1978, ISSN 0347-8742 , p. 231-234 .
- Leslie A. Garay: A generic revision of the Spiranthinae . In: Botanical Museum Leaflets of Harvard University . tape 28 , no. 4 , 1982, pp. 330-331 .
- Alec M. Pridgeon, Phillip Cribb, Mark W. Chase, Finn Rasmussen (Eds.): Genera Orchidacearum. Orchidoideae (Part 2). Vanilloideae . tape 3/2 . Oxford University Press, New York and Oxford 2003, ISBN 0-19-850711-9 , pp. 217-219 .
Individual evidence
- ↑ Gerardo A. Salazar, Mark W. Chase, Miguel A. Soto Arenas, Martin Ingrouille: Phylogenetics of Cranichideae with emphasis on Spiranthinae (Orchidaceae, Orchidoideae): evidence from plastid and nuclear DNA sequences . In: American Journal of Botany . tape 90 , no. 5 , 2003, p. 777-795 .
- ↑ Lotte Burkhardt: Directory of eponymous plant names . Extended Edition. Botanic Garden and Botanical Museum Berlin, Free University Berlin Berlin 2018. [1]
- ↑ a b c d e f g h i j k l Rafaël Govaerts (Ed.): Lankesterella. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved December 8, 2016.
