Microcoelia exilis

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Microcoelia exilis
Microcoelia exilis, bloeiwyse, Safari-uitstalling.jpg
Pendent inflorescence with white flowers.
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Orchidaceae
Subfamily: Epidendroideae
Genus: Microcoelia
Species:
M. exilis
Binomial name
Microcoelia exilis
Synonyms [1]
  • Angraecum chiloschistae Rchb.f.
  • Epidorkis exilis (Lindl.) Kuntze
  • Gussonea chiloschistae (Rchb.f.) Schltr.
  • Gussonea exilis (Lindl.) Ridl.
  • Mystacidium exilis (Lindl.) T. Durand & Schinz
  • Rhaphidorhynchus chiloschistae (Rchb.f.) Finet

Microcoelia exilis, commonly known as the pinhead orchid, is a species of flowering plant in the orchid family, Orchidaceae. It is a leafless epiphyte, a perennial herb that grows in a tangled cluster of roots and stems on the branch of a tree. [2] This orchid is native to tropical central and eastern Africa and was first described in 1830 by the English botanist John Lindley. [3]

Contents

Description

The stem is up to 45 mm (1.8 in) long and 2 to 3 mm (0.08 to 0.12 in) in diameter. The much-branched aerial roots may be either broad or slender and form a tangled mass; many are not attached to the substrate. There are no true leaves but scale leaves are up to 2 to 3 mm (0.08 to 0.12 in) long, and are either beak-like or the apex tapers to a long point; they each have five to eight nerves. There may be multiple inflorescences up to 25 cm (10 in) long, either erect or arching. Each inflorescence has fifty or more minute white flowers with yellowish-green, globose spurs. [4]

Distribution and habitat

Microcoelia exilis is native to tropical central and eastern Africa. Its range includes Uganda, Kenya, Tanzania, the Democratic Republic of Congo, Malawi, Zambia, Zimbabwe, Mozambique and South Africa. It grows on the small branches and twigs of trees (or occasionally on rocks) in gallery forests, woodland, secondary forests and plantations, at elevations of up to about 1,800 m (6,000 ft). [4]

Ecology

In the Southern African Sand Forest, a region of ancient dunes in southern Mozambique and northern KwaZulu-Natal, trees such as Newtonia hildebrandtii , Cola greenwayi and Drypetes arguta are swathed in epiphytes including Microcoelia exilis, and Usnea and other species of lichen. [5]

Culivation

This orchid is sometimes cultivated as a houseplant, attached to a twig and misted at intervals. [6] Trade in this orchid is regulated under CITES Appendix II. [3]

Related Research Articles

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The taxonomy of the Orchidaceae has evolved slowly during the last 250 years, starting with Carl Linnaeus who in 1753 recognized eight genera. De Jussieu recognized the Orchidaceae as a separate family in his Genera Plantarum in 1789. Olof Swartz recognized 25 genera in 1800. Louis Claude Richard provided us in 1817 with the descriptive terminology of the orchids.. The next step was taken in 1830-1840 by John Lindley, who recognized four subfamilies. He is generally recognized as the father of orchid taxonomy. The next important step was taken by George Bentham with a new classification, recognizing subtribes for the first time. This classification was first presented in a paper that Bentham read to the Royal Society in 1881. Then it was published in 1883 in the final volume of Genera Plantarum. The next great contributors were Pfitzer (1887), Schlechter (1926), Mansfeld (1937), Dressler and Dodson (1960), Garay, Vermeulen (1966), again Dressler (1981). and Burns-Balogh and Funk (1986). Dressler's 1993 book had considerable influence on later work.

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<i>Eulophia guineensis</i> Species of orchid

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<i>Bulbophyllum gadgarrense</i> Species of orchid

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<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>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>Vanilla polylepis</i> Species of orchid

Vanilla polylepis is a climbing orchid species in the plant family Orchidaceae. It is native to tropical Africa, with a range spanning the width of the continent, from Kenya to Angola. It grows in high-altitude evergreen and swamp forests between 1,200–1,500 m (3,900–4,900 ft) and is often found growing on trees bordering rivers and waterfalls. Plants produce bright green, fleshy stems, 10–12 mm (0.39–0.47 in) in diameter, with large, glossy leaves. White, aerial roots form on the stems allowing the orchids to attach themselves to trees for support. As with many orchids, they produce showy flowers, which in the case of V. polylepis are white and yellow with a pink to maroon blotch. This differentiates them from similar species. They have seedpod-like fruits, called capsules, which produce a distinctive aroma as they dry. They are closely related to the well-known species Vanilla planifolia, whose seed pods are used commercially in the production of vanilla flavouring.

<i>Ficus sansibarica</i>

The Knobbly fig is an African species of cauliflorous fig. It is named after Zanzibar, where Franz Stuhlmann discovered it in 1889. They often begin life as epiphytes, which assume a strangling habit as they develop. They regularly reach 10 m, but may grow up to 40 m tall as forest stranglers.

<i>Newtonia hildebrandtii</i>

Newtonia hildebrandtii, the Lebombo wattle, is a medium-sized tree native to eastern Africa. It is a protected tree in South Africa.

<i>Robiquetia gracilistipes</i>

Robiquetia gracilistipes, commonly known as the large pouched orchid, is an epiphytic or lithophytic orchid from the family Orchidaceae that forms large, hanging, straggly clumps. It has long, thick, roots, a single stem, many thick, leathery leaves and up to forty cream-coloured, pale green or brownish flowers with red spots and a three-lobed labellum. It grows on trees and rocks in rainforest, usually in bright light. It is found in Malesia including New Guinea, the Solomon Islands and tropical North Queensland, Australia.

Taeniophyllum muelleri, commonly known as the chain ribbonroot, is a species of leafless epiphytic or lithophytic orchid that usually forms tangled colonies. It has short stems and cylindrical green roots pressed against the substrate on which it is growing. Between five and twelve yellowish green, tube-shaped flowers open one at a time. This orchid occurs in eastern Australia and New Caledonia.

Phreatia crassiuscula, commonly known as the green caterpillar orchid, is a plant in the orchid family and is an epiphyte or lithophyte with three to six fleshy, channelled leaves in a fan-like arrangement. Up to sixty tiny white, cream-coloured or greenish flowers are arranged along a curved flowering stem. It is endemic to tropical North Queensland.

<i>Thelasis carinata</i> Species of orchid

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<i>Drypetes arguta</i>

Drypetes arguta, commonly known as the water ironplum, is a species of small tree or large bush in the family Putranjivaceae. It is native to tropical East Africa. It was first described in 1920 by the English botanist John Hutchinson, who named it Cyclostemon argutus. It was later transferred to the genus Drypetes.

<i>Stelis gracilis</i> Species of orchid

Stelis gracilis is a species of leach orchid, which is one of the largest genera in the orchid family, with over 600 species. Stelis gracilis are small epiphytes with greenish-white flowers in raceme inflorescences. This rare species of orchid is found in tropical rainforests in North and Central America. It was first described by the American botanist Oakes Ames in 1908.

References

  1. "Microcoelia exilis Lindl". The Plant List. Retrieved 28 July 2019.
  2. "Microcoelia exilis Lindl". Flora of Zimbabwe. Retrieved 28 July 2019.
  3. 1 2 "Microcoelia exilis Lindl". Tropicos. Missouri Botanical Garden. Retrieved 28 July 2019.
  4. 1 2 Cribb, Phillip (1989). Flora of Tropical East Africa: Orchidaceae. CRC Press. pp. 512–513. ISBN   978-90-6191-353-5.
  5. Matthews, Wayne. "Maputaland's Tembe Elephant National Park – a little known reserve with many natural secrets" . Retrieved 28 July 2019.
  6. Northen, Rebecca Tyson (1996). Miniature Orchids and How to Grow Them. Courier Corporation. p. 110. ISBN   978-0-486-28920-5.