Aspidogyne

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Aspidogyne
Aspidogyne nobilis

Aspidogyne nobilis

Systematics
Order : Asparagales (Asparagales)
Family : Orchids (orchidaceae)
Subfamily : Orchidoideae
Tribe : Cranichideae
Sub tribus : Goodyerinae
Genre : Aspidogyne
Scientific name
Aspidogyne
Garay

Aspidogyne is a genus from the family of the orchid (Orchidaceae). It consists of about 78 types of herbaceous plants that are native to tropical America.

description

The species of the genus Aspidogyne form a creeping rhizome that is rooted at the nodes . The ascending shoots carry the leaves in a loose rosette, the internodes are not strongly compressed. The leaves are broad to narrowly oval in shape and have a distinct stalk. The leaf base includes the shoot.

The racemose inflorescence appears terminal. The inflorescence axis is hairy and is surrounded by a few bracts . The bracts are about as long as ovary and the short flower stalk together. The flowers are resupinated , the petals are free. The three sepals are roughly the same shape and size, hairy on the outside. The lateral petals lie close to the upper petal and form a tube or hood. The lip forms a long spur at the base. The lip is divided into two parts: the basal part, the hypochil, is slightly bowl-shaped and lies close to the column . The front part, the epichil, is bent back downwards. The column is elongated, the large separating tissue between the stigma and stamen (rostellum) is striking . There are two closely spaced areas of scar on the underside of the column. The only fertile stamen contains two pollinia , each of which is connected to the adhesive disc (Viscidium) by a small stalk.

Occurrence

Aspidogyne is common in tropical America. In the north, Guatemala and Honduras are still settled, in the south the area extends to Paraguay and northern Argentina. The species grow in the humus layer of moist forests, occasionally also on rocks covered with moss.

Aspidogyne commelinoides , illustration
Illustration by: I Aspidogyne decora (Fig. I , right) and Aspidogyne hylibates (Fig. II, left)
Illustration of: Aspidogyne foliosa (Fig. I, left) and Aspidogyne metallescens (Fig. II, right)
Aspidogyne stigmatoptera

Systematics and botanical history

Aspidogyne is classified within the tribe Cranichideae in the subtribe Goodyerinae . According to Dressler, this can be further divided into two groups; Aspidogyne stands together with the majority of the genera that do not have two clearly separated scar surfaces. Related genera are the Kreodanthus and Microchilus , which are also widespread in South America .

The genus Aspidogyne was established in 1977 by Leslie Garay . As a type species he chose the up to then as Pelexia foliosa called aspidogyne foliosa .

78 species are counted to Aspidogyne :

See also

literature

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. 298 .
  • 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. 72-74 .

Individual evidence

  1. ^ Robert L. Dressler: Phylogeny and Classification of the Orchid Family . Cambridge University Press, 1993, ISBN 0-521-45058-6 , pp. 118 .
  2. ↑ a b c Rafaël Govaerts (Ed.): Aspidogyne. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved March 26, 2020.

Web links

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