Aglossorrhyncha
Aglossorrhyncha aurea
The genus Aglossorrhyncha from the orchid family (Orchidaceae) consists of 13 species. The plants grow mostly epiphytic, they are found in tropical Asia.
Description
The shoot axis of Aglossorrhyncha species is a rhizome and rooted, two lines occupied in the lower part of the upper part with leaves. Often of the rung is compressed laterally, it may be branched, unbranched or more. The sheets include with its base the shoot, usually they have a solid, leathery texture, its edge can be very finely serrated. The leaves are discarded after one growing season.
The non resupinierten flowers are single or in pairs at the end of the rung, they are yellow to greenish and each has a relatively large bract. The bracts are papery thin and long stick on the plant. Sepals and petals are about the same shape and not grow together. The lip is often darker in color than the other petals, in the lower region is concave with the rolled edges of the column, especially in the front area is fleshy, the lip extends centrally along a fleshy keel. The club-shaped column has each side of the scar widening or appendage on; also the column tissue that surrounds the stamen ( Klinandrium ) has laterally on each one serrated, square in outline appendage. The separation between scar tissue and stamen ( rostellum ) is arranged transversely to the column axis about the scar. The stamen contains two chambers in a total of four club-shaped pollinia. The viscid disc ( Viscidium ) is two pollinia described as a summary or as non-existent. The capsule fruit is broadly oval to roundish.
Dissemination
The species of the genus Aglossorrhyncha are widespread in tropical Asia. Most species are native to New Guinea, and some also on surrounding islands: the Moluccas, the Bismarck Archipelago, the Solomon Islands, Fiji, Vanuatu and Palau. After Schuiteman there are also deposits in the Philippines. There are colonized 350-2800 meters altitude. The plants grow as epiphytes in humid forests at higher elevations even in terrestrial montane scrub.
Systematics and botanical history
The genus Aglossorrhyncha was erected in 1905 by Rudolf Schlechter. The name is composed of the privative prefix a- and the name of a similar genre, Glossorhyncha, together distinguished the new genus of the Poor. In his original description states Aglossorrhyncha, which is considered to be corrected typographical errors. Dressler puts them in a subtribe Glomerinae within the so-called Epidendreae II Also included in this subtribe he represents the genera Agrostophyllum, Earina, glomera, Glossorhyncha, Ischnocentrum and Sepalosiphon. Two other related genera, Adrorhizon and Sirhookera, it separates from the subtribe Adrorhizinae. A study by van den Berg et al. found that of all the name-giving genus glomera is not closely related to the other plants, the group is now called Agrostophyllinae; Aglossorrhyncha was not investigated in this study. It is unclear whether Aglossorrhyncha should now be placed together with glomera in the subtribe Coelogyninae ( Tribus Arethuseae ), or together with the Agrostophyllinae rather the tribe Vandeae stands close.
The following species are known in the genus Aglossorrhyncha:
- Aglossorrhyncha aurea Schltr.
- Aglossorrhyncha biflora J.J.Sm.
- Aglossorrhyncha bilobula Cyrus
- Aglossorrhyncha Fruticicola J.J.Sm.
- Aglossorrhyncha galanthiflora J.J.Sm.
- Aglossorrhyncha jabiensis J.J.Sm.
- Aglossorrhyncha lucida Schltr. Aglossorrhyncha lucida var dischorensis Schltr.
- Aglossorrhyncha lucida var lucida
- Aglossorrhyncha lucida var wariana Schltr.