Coelogyne | |
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Coelogyne cristata | |
Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Monocots |
Order: | Asparagales |
Family: | Orchidaceae |
Subfamily: | Epidendroideae |
Tribe: | Arethuseae |
Subtribe: | Coelogyninae |
Genus: | Coelogyne Lindl. |
Type species | |
Coelogyne cristata Lindl. [1] | |
Species | |
See text. | |
Synonyms [2] | |
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Coelogyne is a genus of 594 species, [2] which are sympodial epiphytes from the family Orchidaceae, distributed across India, China, Indonesia and the Fiji islands, with the main centers in Borneo, Sumatra and the Himalayas. They can be found from tropical lowland forests to montane rainforests. A few species grow as terrestrials or even as lithophytes in open, humid habitats. The genera Bolborchis Lindl. , Hologyne Pfitzer and Ptychogyne Pfitzer are generally included here. The genus is abbreviated Coel. in trade journals.
The name Coelogyne was first published as Caelogyne in 1821 by John Lindley. [3] and is derived from the Ancient Greek words κοῖλος (koîlos, hollow) and γῠνή (gunḗ, woman), referring to the concave stigma.
A few species are commonly known as "necklace orchids", because of their long, pendant, multi-flowered inflorescence.
This genus lacks the saccate base of the labellum, a typical characteristic which is present in the other genera in the subtribe Coelogyninae. The free lip has high lateral lobes along the basal part of the labellum (hypochile) and smooth, toothed or warty keels.
The pseudobulbs of one internode vary in size. They may be closely or widely spaced through sympodial growth along the rhizome.
Inflorescences often show a small to very large number of showy, medium-sized to large flowers. They may arise either from the apex of the newly completed pseudobulb at the end of the growing season (as in Coelogyne fimbriata), or may precede the new growth in early spring (as in Coelogyne cristata). The typical colour range of this genus is white, through tawny brown to green, and occasionally peachy tones. All species have four pollinia.
They have often a sweet scent, attracting different kinds of pollinators, such as bees, wasps and beetles.
The cooler growing species such as Coelogyne fimbriata, Coelogyne ovalis, Colegyne fuliginosa, Coelogyne cristata, Coelogyne flaccida, Coelogyne nitida originate in the Himalayan region of India and southeast Asia.
The traditional taxonomy of the genus Coelogyne is still disputed. Coelogyne has been subdivided in 23 sections or subgenera by De Vogel (1994) and Clayton. Molecular data show that Coelogyne is paraphyletic and should be reorganised. It should include the genera Neogyna and Pholidota , and several sections should be removed, including Cyathogyne, Tomentosae, Rigidiformes, Veitchiae and Verrucosae. This new genus Coelogyne should then contain about 160 species. [4]
The type species is Coelogyne cristata .
The database IPNI gives 415 entries for this genus, but a large number are invalid or have become synonyms. These are not mentioned in the following traditional list.
Coelogyne hybrids include:
The wide distribution of this genus has resulted in a wide variety of temperature requirements from species to species, some requiring cool to cold conditions to grow and bloom reliably, while others need decidedly warmer temperatures to achieve the same.
The orchids in this genus require a decided rest period during winter in which they receive no feed, very little water (enough to prevent pseudobulbs shrivelling), cool to cold temperatures and high light. These conditions seem to aid flowering in spring for some growers, though others report that more constant conditions can also produce regular flowering.
Spathoglottis, commonly known as purple orchids or 苞舌兰属 is a genus of about fifty species of orchids in the family Orchidaceae. They are evergreen terrestrial herbs with crowded pseudobulbs, a small number of leaves and medium-sized resupinate flowers on an upright flowering stem. The sepals and petals are all similar to each other and are white, yellow, pink or purple. Species of Spathoglottis are found from eastern and south-eastern Asia to Australia and some Pacific Islands.
Calanthe, commonly known as Christmas orchids, is a genus of about 220 species of orchids in the family Orchidaceae. They are evergreen or deciduous terrestrial plants with thick roots, small oval pseudobulbs, large corrugated leaves and upright, sometimes arching flowering stems. The sepals and petals are narrow and a similar size to each other and the labellum usually has spreading lobes.
Phaius, commonly known as swamp orchids or in Chinese as 鶴頂蘭屬/鹤顶兰属 , is a genus of forty-five species of flowering plants in the orchid family, Orchidaceae. They are evergreen, terrestrial herbs which form clumps with crowded, sometimes stem-like pseudobulbs, large, pleated leaves and relatively large, often colourful flowers. Species in this genus are found in the tropical parts of Africa, Asia, Southeast Asia, New Guinea, Australia, and various islands of the Pacific and Indian Oceans. One species is also naturalized in Hawaii, Florida, and the Caribbean.
Specklinia is a genus of orchids native to South America, Central America, and the Caribbean. It contains approximately 100 species.
Zeuxine, commonly known as verdant jewel orchids, is a genus of about eighty species of orchids in the tribe Cranichideae. They are native to parts of tropical Africa, Asia, Southeast Asia, New Guinea, Australia and some Pacific Islands. They have relatively narrow, dark green leaves and small, dull-coloured resupinate flowers with the dorsal sepal and petals overlapping to form a hood over the column. The labellum has a pouched base and its tip has two lobes.
Eria is a genus of orchids with more than 50 species distributed in China, the Himalayas, the Indian Subcontinent, Southeast Asia, New Guinea, Polynesia, Melanesia and Micronesia.
Mycaranthes is a genus of orchids. It was previously considered as a synonym of the genus Eria, but eventually it has become an accepted name. Its species are native to Southeast Asia, China, the Himalayas and New Guinea.
Pinalia, commonly known as gremlin orchids, is a genus of flowering plants in the family Orchidaceae. Orchids in this genus are large epiphytic or lithophytic plants with prominent pseudobulbs, each with up to three thin, flat leaves and cup-shaped, relatively short-lived flowers with scale-like brown hairs on the outside. There are about 120 species occurring from tropical to subtropical Asia to the south-west Pacific.
Appendicula, commonly known as stream orchids or 牛齿兰属 , is a genus of flowering plants in the family Orchidaceae. Orchids in this genus are epiphytic, lithophytic or rarely terrestrial plants herbs with many flat, often twisted leaves and small resupinate, white or greenish flowers. The sepals are free from each other but the lateral sepals and labellum are fused to the base of the column.
Phreatia, commonly known as lace orchids, is a genus of flowering plants from the orchid family, Orchidaceae, native to regions bordering the Pacific and Indian Oceans. Plants in this genus are epiphytes, sometimes with pseudobulbs, in which case there are usually one or two leaves. Others lack pseudobulbs but have up to twelve leaves. A large number of small white or greenish flowers are borne on a flowering stem emerging from a leaf axil or from the base of the pseudobulb when present but the flowers do not open widely. There are about 220 species, distributed from tropical and subtropical Asia to the Pacific.
Robiquetia, commonly known as pouched orchids, is a genus of flowering plants from the orchid family, Orchidaceae. Plants in this genus are epiphytes with long, sometimes branched, fibrous stems, leathery leaves in two ranks and large numbers of small, densely crowded flowers on a pendulous flowering stem. There are about eighty species found from tropical and subtropical Asia to the Western Pacific.
Trichoglottis, commonly known as cherub orchids or 毛舌兰属 , is a genus of flowering plants in the family Orchidaceae. Orchids in this genus are epiphytic plants with thick roots, relatively thick, fibrous stems and many large, thick, leathery leaves arranged in two ranks. The flowers are usually small and yellowish with light brown or purple markings. The flowers have broad sepals, narrower petals and a labellum which has three lobes and is often hairy. There are about 85 species distributed from tropical and subtropical Asia to the north-western Pacific. Most species grow in rainforest.
Pholidota, commonly known as rattlesnake orchids, is a genus of flowering plants from the orchid family, Orchidaceae. Plants in this genus are clump-forming epiphytes or lithophytes with pseudobulbs, each with a single large leaf and a large number of small, whitish flowers arranged in two ranks along a thin, wiry flowering stem that emerges from the top of the pseudobulb. There are about thirty five species native to areas from tropical and subtropical Asia to the southwestern Pacific.
Peristylus, sometimes commonly known as ogre orchids or bog orchids is a genus of flowering plants from the orchid family, Orchidaceae. It consists of over 100 known species found across much of eastern and southern Asia as well as in Australia and on many islands of the Indian and Pacific Oceans.