Rhomboda

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Rhomboda
Yan Li Chi Chun Lan Anoectochilus moulmeinensis -Kun Ming Jin Dian Zhi Wu Yuan Kunming YuanLin Botanic Gardens, China- (9255247298).jpg
Rhomboda moulmeinensis
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Orchidaceae
Subfamily: Orchidoideae
Tribe: Cranichideae
Subtribe: Goodyerinae
Genus: Rhomboda
Lindl. [1]
Type species
Rhomboda longifolia
[2]

Rhomboda, commonly known as velvet jewel orchids, [3] is a genus of about twenty species of flowering plants in the orchid family Orchidaceae. Plants in this genus are mostly terrestrial herbs with a fleshy, creeping rhizome and a loose rosette of green to maroon coloured leaves. Small resupinate or partly resupinate, dull coloured flowers are borne on a hairy flowering stem. The dorsal sepal and petals overlap and form a hood over the column and there is a deep pouch at the base of the labellum. They are found in tropical regions from northern India through Southeast Asia, China, Japan to Australia and some Pacific Islands.

Contents

Description

Orchids in the genus Rhomboda are usually terrestrial, perennial, deciduous, sympodial herbs with a creeping, fleshy, above-ground rhizome anchored to the ground by wiry roots. A few species are epiphytic. The leaves are spirally arranged around the stem with the upper leaves forming a loose rosette. They are dark green to maroon or brownish with a central white or red line. The flowers are resupinate or partly resupinate with the dorsal sepal and petals fused to form a hood over the column. The lateral sepals are similar to the dorsal sepal, free and often spreading. The labellum has a deep pouch near its base, a narrow middle section and often has a hooked tip. [3] [4] [2] [5] [6]

Taxonomy and naming

The genus Rhomboda was first formally described in 1857 by John Lindley and the description was published in Journal of the Linnean Society, Botany . [1] [7] The name Rhomboda is derived from the Ancient Greek word rhombos meaning "a top", [8] referring to the shape of the calli on the labellum of the type specimen. [4]

Distribution

Orchids in the genus Rhomboda are native to Nepal, India, Sri Lanka, Bhutan, China, Myanmar, Thailand, Laos, Cambodia, Vietnam, Japan, the Philippines, New Guinea, New Caledonia, the Solomon Islands, Vanuatu and Queensland between the Daintree and Paluma.

Species list

The following is a list of species accepted by the World Checklist of Selected Plant Families as at August 2018: [1]

Related Research Articles

<i>Tainia</i> Genus of orchids

Tainia, commonly known as ribbon orchids or 带唇兰属 is a genus of about thirty species of evergreen, terrestrial orchids in the distributed from India, China, Japan, Southeast Asia to New Guinea, the Solomon Islands and Queensland.

<i>Zeuxine</i> Genus of orchids

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.

<i>Anoectochilus</i> Genus of orchids

Anoectochilus, commonly known as marbled jewel orchids or filigree orchids, is a genus of about fifty species in the orchid family Orchidaceae. They are terrestrial herbs with a creeping rhizome, an upright flowering stem and dark coloured leaves with contrasting veins. The flowers are relatively large and have a large labellum, markedly different from the sepals and petals.

<i>Goodyera</i> Genus of orchids

Goodyera, commonly called rattlesnake plantain, jade orchids or ladies' tresses is a wide-ranging genus of orchids in the tribe Cranichideae. About 100 species of Goodyera have been formally described. With a center of diversity in East Asia, Goodyera is found across Europe, Madeira, North and Central America, Australia, and on islands from the west Indian Ocean to the Pacific Ocean. They have a rosette of leaves at their base and usually many small white resupinate flowers. They are similar to orchids in the genus Spiranthes but can be distinguished from them by the shape and colour patterns of the leaves.

<i>Gastrodia</i> Genus of orchids

Gastrodia, commonly known as potato orchids, is a genus of terrestrial leafless orchids in the family Orchidaceae, about ninety of which have been described. Orchids in this genus have fleshy, upright stems and small to medium-sized resupinate flowers with narrow sepals and petals. They are native to Asia, Australia, New Zealand, central Africa, and various islands of the Indian and Pacific Oceans.

<i>Didymoplexis</i> Genus of plants

Didymoplexis, commonly known as crystal orchids or as 双唇兰属 , is a genus of terrestrial leafless orchids in the family Orchidaceae, about twenty species of which have been described. Orchids in this genus have swollen, fleshy rhizomes and thin, pale, upright fleshy flowering stems with resupinate, bell-shaped white or pale yellowish brown flowers. They are native to Africa, Madagascar, Southeast Asia, Australia and various islands of the Pacific.

<i>Pinalia</i> Genus of orchids

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.

<i>Phreatia</i> Genus of orchids

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.

<i>Tropidia</i> (plant) Genus of orchids

Tropidia, commonly known as crown orchids, is a genus of about thirty species of evergreen terrestrial orchids in the family Orchidaceae. They have thin, wiry stems with two or more tough, pleated leaves with a flowering spike at the top of the stem, bearing crowded flowers. Species in this genus are distributed across the warmer parts of both the Eastern and Western Hemispheres.

<i>Robiquetia</i> Genus of orchids

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.

<i>Trichoglottis</i> Genus of orchid

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.

<i>Pholidota</i> (plant) Genus of orchids

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.

<i>Cheirostylis</i> Genus of flowering plants

Cheirostylis, commonly known as fleshy jewel orchids or velvet orchids, is a genus of about sixty species of flowering plants in the orchid family Orchidaceae. Plants in this genus are terrestrial herbs with a caterpillar-like rhizome and a loose rosette of leaves. Small, white, hairy flowers develop as the leaves wither. They are found in tropical Africa, southern Asia, Southeast Asia, Malesia, New Guinea and Australia.

<i>Vrydagzynea</i> Genus of orchids

Vrydagzynea, commonly called tonsil orchids, is a genus of orchids in the tribe Cranichideae. About forty five species of Vrydagzynea have been formally described. They are native to India, Taiwan, Southeast Asia, Malesia, Melanesia and Polynesia. A single species in Australia is possibly extinct. They have thinly textured, stalked leaves and small, dull-coloured resupinate flowers with the dorsal sepal and petals overlapping to form a hood over the column.

<i>Thelasis</i> Genus of orchids

Thelasis, commonly known as fly orchids, is a genus of flowering plants from the orchid family, Orchidaceae. Plants in this genus are usually epiphytes, sometimes lithophytes or rarely terrestrials. Some species have pseudobulbs with up to three leaves, whilst others have several leaves in two ranks. A large number of small, white or greenish yellow flowers are borne on a thin, arching flowering stem. There are about thirty species, distributed from tropical and subtropical Asia to the southwest Pacific.

<i>Hetaeria</i> Species of orchid

Hetaeria, commonly known as hairy jewel orchids, is a genus of about thirty species of flowering plants in the orchid family Orchidaceae. Plants in this genus are terrestrial herbs with a succulent rhizome and a loose rosette of leaves. Small, pale, hairy non-resupinate flowers are borne on a thin, hairy flowering stem. They are found in tropical Africa and Asia to New Guinea, Australia and some Pacific Islands.

<i>Micropera</i> Genus of orchids

Micropera, commonly known as dismal orchids or 小囊兰属 is a genus of about twenty species of flowering plants from the orchid family, Orchidaceae. Plants in this genus are large epiphytes with thick roots, long, fibrous stems, linear leaves and whitish or yellow, non-resupinate flowers. The sepals and petals are similar to each other and the labellum is shoe-shaped or sac-like and has three lobes. It is found from Tibet to tropical Asia and the western Pacific Ocean.

<i>Peristylus</i> Genus of orchids

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.

<i>Pomatocalpa</i> Genus of orchids

Pomatocalpa, commonly known as bladder orchids, or 鹿角兰属 , is a genus of about twenty five species from the orchid family, Orchidaceae. Plants in this genus are epiphytes or lithophytes with thick, leathery leaves and a large number of small flowers with a three-lobed labellum. There are about twenty five species found from tropical and subtropical Asia to the south-west Pacific.

<i>Schoenorchis</i> Genus of orchids

Schoenorchis, commonly known as flea orchids, or 匙唇兰属 in Chinese, is a genus of flowering plants from the orchid family, Orchidaceae. Plants in this genus are small epiphytes with thin roots, thin leafy stems with leaves in two ranks and tiny fragrant, almost tube-shaped flowers with a prominently spurred labellum. There are about twenty five species found from tropical and subtropical Asia to the Western Pacific.

References

  1. 1 2 3 "Rhomboda". World Checklist of Selected Plant Families (WCSP). Royal Botanic Gardens, Kew.
  2. 1 2 D.L.Jones; T.Hopley; S.M.Duffy (2010). "Rhomboda". Australian Tropical Rainforest Orchids . Centre for Australian National Biodiversity Research (CANBR), Australian Government . Retrieved 29 May 2021.
  3. 1 2 Jones, David L. (2006). A complete guide to native orchids of Australia including the island territories. Frenchs Forest, N.S.W.: New Holland. p. 349. ISBN   1877069124.
  4. 1 2 Alec M. Pridgeon; Phillip J. Cribb; Mark W. Chase; Finn N. Rasmussen, eds. (2003). Genera orchidacearum (Volume 3). Oxford University Press. pp. 142–145. ISBN   0198507119.
  5. "Rhomboda". Flora of China. Retrieved 4 September 2018.
  6. "Genus Rhomboda". Orchids of New Guinea. Retrieved 4 September 2018.
  7. Lindley, John (1825). "The Orchidology of India". Journal of the Linnean Society, Botany. 1: 181. Retrieved 4 September 2018.
  8. Brown, Roland Wilbur (1956). The Composition of Scientific Words. Washington, D.C.: Smithsonian Institution Press. p. 227.