Lecanorchis

Lecanorchis is a genus of the orchid family ( Orchidaceae). It contains 18 species of herbaceous plants that are native to East and Southeast Asia.

Description

The species of the genus are terrestrial Lecanorchis growing herbaceous plants. You are leafless and feed mykoheterotroph. Underground there are numerous fleshy, horizontal roots spread out on a short, ascending rhizome. Above ground appears a thin, dark brown, occasionally branched shoot. The leaves are reduced to small scales.

The loose, racemose inflorescence contains some brownish, yellowish or greenish, resupinierte flowers. The ovary is thin, fitted at the top with a bowl-shaped, serrated, sepal -like expansion ( Calyculus ), which can still be seen on the fruit later. Between ovary and petals there is a separating tissue. The sepals and petals are oblong - oval and not grow together. The lip is three-lobed or entire, at the base of the edge is fused with the column into a tube. The lamina of the lip is hairy. The column is slender, the front end with two lateral appendages. The stamen is zweikammrig, the pollen is as individual pollen grains before ( monads ) that are loose but formed into two pollinia crumbly. The capsule fruit contains numerous seeds, which have two characteristic thread-like, to 0.9 mm long appendages. The withered stalks of Lecanorchis plants remain up to one year after flowering upright.

Dissemination

Lecanorchis is from Japan and Korea in the north to China, Indo-China, the Philippines, the Indonesian islands spread to New Guinea. The plants grow in the leaf litter of evergreen forests. They colonize altitudes up to 1500 meters.

Systematics and botanical history

Lecanorchis is classified within the subfamily Vanilloideae in the tribe Vanilleae. According to genetic studies Lecanorchis is probably the sister taxon of the genus Vanilla ( Vanilla ), possibly also closely related to Epistephium. Since the plants do not produce chlorophyll, the chloroplast DNA, which is often used for studies can not be used for the study of kinship relations.

Lecanorchis was first described in 1856 by Carl Ludwig Blume. The name comes from the Greek Lecanorchis λεκάνη lecane, "pot", and refers to the bowl-shaped end of the ovary. Type species is Lecanorchis javanica,

The following species are counted to the genus Lecanorchis:

• Lecanorchis amethystea Y.Sawa, Fukunaga & S.Sawa
• Lecanorchis bicarinata Schltr.
• Lecanorchis brachycarpa Ohwi
• Lecanorchis ciliolata J.J.Sm.
• Lecanorchis flavicans Fukuy.
• Lecanorchis japonica flower
• Lecanorchis javanica Blume
• Lecanorchis kiusiana Tuyama
• Lecanorchis malaccensis Ridl.
• Lecanorchis multiflora J.J.Sm.
• Lecanorchis neglecta Schltr.
• Lecanorchis nigricans Honda
• Lecanorchis seidenfadenii Szlach. & Mytnik
• Lecanorchis sikkimensis N.Pearce & P.J.Cribb
• Lecanorchis suginoana ( Tuyama ) seriz.
• Lecanorchis thalassica T.P.Lin
• Lecanorchis vietnamica Aver.
• Lecanorchis virella T.Hashim.

Documents

• Orchids
• Orchidaceae
• Mykoheterotrophe plant