Eltroplectris

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Eltroplectris
Eltroplectris schlechteriana

Eltroplectris schlechteriana

Systematics
Order : Asparagales (Asparagales)
Family : Orchids (orchidaceae)
Subfamily : Orchidoideae
Tribe : Cranichideae
Sub tribus : Spiranthinae
Genre : Eltroplectris
Scientific name
Eltroplectris
Raf.

Eltroplectris is a genus from the family of the orchid (Orchidaceae). It is made up of 15 types of herbaceous plants that are native to tropical America.

description

To eltroplectris include small, herbaceous , perennial , terrestrial growing plants. The roots arise in clusters from the rhizome . They are fleshy and densely hairy. One or two long-stalked leaves are basal (not on the stem). The petiole includes the stem axis at the base . The leaf blade is oval, the leaf veins slightly sunken on the upper side of the leaf. Sometimes the leaves are wilting by the time they bloom.

The inflorescence is terminal, it is erect, slender, a loosely little to many-flowered cluster . The upper part of the inflorescence stalk is hairy, often reddish-brown and covered with bracts that partially envelop it. The bracts may be reddish, the bracts are green. The flowers are resupinated and point upwards, they are greenish, white or red in color. The ovary is cylindrical, sessile or very short-stalked. The lateral sepals are free and spread apart in the front part, the rear part forms a spur together with the rearward extension of the column (column base) . The upper sepal is shorter than the side sepals, completely free, the tip often bent back. The petals adhere to the dorsal sepal and form a hood with it, running down the column at their base. The lip is long and slender at its base, somewhat fused with the lateral sepals, at the entrance to the spur there are two elongated nectar glands on the edge of the lip. The front part of the lip is wider and trilobed. The side flaps are turned up and clinging to the column, the middle flap bends down. The column is club-shaped, slender, at the base with a long free column foot. The scar consists of two separate areas, clearly separated from each other or close together, but always distinguishable, separated by a fold that runs along the entire underside of the column. The dividing tissue between the stigma and stamen (rostellum) is firm, somewhat cartilaginous, elongated-triangular, pointed. The stamen is elongated oval shaped and not surrounded by tissue of the column (clinandrium). The yellow pollinia are powdery-grainy consistency, club-shaped, with an elongated adhesive body ( Viscidium ).

Occurrence

Eltroplectris is distributed from Florida in the north over the Caribbean to the south of Brazil, to Paraguay and Argentina. Central America and the Amazon basin are not populated. The species occur at altitudes up to 500 meters. The locations are often characterized by a seasonally dry climate.

Eltroplectris calcarata

Systematics and botanical history

Eltroplectris is classified within the tribe Cranichideae in the subtribe Spiranthinae . Related genera are Mesadenella , Sacoila and Stenorrhynchos .

The genus Eltroplectris was described by Rafinesque in 1837 . Type species is Eltroplectris calcarata . The name Eltroplectris is made up of the Greek words ἐλεύθερος eleutheros , "free", and plectron , "spur" and refers to the spur that is not attached to the ovary .

The following species are included in Eltroplectris :

supporting documents

Most of the information in this article comes from:

  • James D. Ackerman: Eltroplectris . In: Flora of North America Editorial Committee (Ed.): Flora of North America North of Mexico . tape 26 . Oxford University Press, New York and Oxford 2003, pp. 524 ( eFloras.org [accessed December 19, 2008]).
  • 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. 238-239 .
  • Leslie A. Garay: A generic revision of the Spiranthinae . In: Botanical Museum Leaflets of Harvard University . tape 28 , no. 4 , 1982, pp. 317 .
  • 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. 200-204 .

Individual evidence

  1. ↑ 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 .
  2. ↑ a b c d e f g h i j k l m n o p Rafaël Govaerts (Ed.): Eltroplectris. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved March 29, 2020.

Further information

Commons : Eltroplectris  - album with pictures, videos and audio files