Plectorrhiza

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Tangle orchids
Plectorrhiza brevilabris.jpg
Plectorrhiza brevilabris on Cape York Peninsula
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Orchidaceae
Subfamily: Epidendroideae
Tribe: Vandeae
Subtribe: Aeridinae
Genus: Plectorrhiza
Dockrill [1]

Plectorrhiza, commonly known as tangle orchids, [2] is a genus of three species of flowering plants from the orchid family, Orchidaceae and is endemic to Australia. Orchids in the genus Plectorrhiza are epiphytic or lithophytic herbs with short stems, long, tangled roots, short leathery leaves and small flowers on a short, thin flowering stem. Two species occur in eastern Australia and one is endemic to Lord Howe Island.

Contents

Description

Orchids in the genus Plectorrhiza are epiphytic or lithophytic, monopodial herbs with long, thick, tangled roots mostly growing in the air. They have two or more short, leathery leaves on each shoot. There are several small, resupinate flowers on a short, thin flowering stem. The sepals and petals are similar to and free from each other, the petals slightly shorter than the sepals. The labellum has three lobes and a backward-pointing spur with a hairy, finger-like callus.

Taxonomy and naming

The genus Plectorrhiza was first formally described in 1967 by Alick Dockrill and the description was published in Australasian Sarcanthinae. [3] The three species of Plectorrhiza had previously been included in the genus Cleisostoma .

Species list

Distribution and habitat

All three species of Plectorrhiza grow in shady, humid forests. Plectorrhiza tridentata is the most widespread of the three, growing in eastern Queensland, New South Wales and the far north-eastern corner of Victoria. Plectorrhiza brevilabris is only found in Queensland and P. erecta only in coastal parts of Lord Howe Island.

See also

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<i>Dendrobium discolor</i> Species of orchid

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<i>Dendrobium jonesii</i> Species of orchid

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<i>Dendrobium tetragonum</i> Species of orchid

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<i>Drymoanthus</i> Genus of orchids

Drymoanthus, commonly known as midget orchids is a genus of epiphytic orchids in the family Orchidaceae. Plants in this genus are relatively small and unbranched with thick roots, narrow crowded leaves and small scented green flowers with a white labellum. There are four species, found in Australia, New Zealand and New Caledonia.

<i>Taeniophyllum</i> Genus of orchids

Taeniophyllum, commonly known as ribbon roots or 带叶兰属 is a genus of about 240 species of epiphytic or lithophytic plants from the orchid family, Orchidaceae. Plants in this genus are more or less leafless with a very short stem and roots that are often flat, green and photosynthetic. The flowers are small, short-lived, flat or tube-shaped and arranged on short, thin flowering stems. Orchids in this genus are found in Africa, tropical and subtropical Asia, New Guinea, Australia and some Western Pacific Islands.

Rhinerrhiza divitiflora, commonly known as the raspy root orchid, is the only species in the genus Rhinerrhiza from the orchid family, Orchidaceae. It is an epiphytic or lithophytic orchid with usually only a single stem, many flat, raspy roots, between two and six leathery leaves and up to sixty pale orange flowers with red spots and blotches. The sepals and petals are narrow, thin and pointed. It mainly grows on rainforest trees and is found between the Atherton Tableland in Queensland and the Hunter River in New South Wales.

Saccolabiopsis, commonly known as pitcher orchids, or 拟囊唇兰属 , is a genus of flowering plants from the orchid family, Orchidaceae. Plants in this genus are small epiphytes with short, fibrous stems, smooth, thin roots, a few thin, oblong to lance-shaped leaves in two ranks and large numbers of small green flowers on an unbranched flowering stem. There are about fifteen species found from the eastern Himalayas to the south-west Pacific.

<i>Dendrobium moorei</i> Species of orchid

Dendrobium moorei, commonly known as the drooping cane orchid, is a species of epiphytic or lithophytic orchid in the family Orchidaceae and is endemic to Lord Howe Island. It has cylindrical pseudobulbs, leathery, dark green leaves and between two and fifteen small, white drooping flowers that do not open widely.

Plectorrhiza erecta , commonly known as the upright tangle orchid, is an epiphytic or lithophytic orchid that has many coarse, cord-like roots, many bright green leaves and up to five yellowish orange, cup-shaped flowers with purplish blotches. It grows close to the ground on fibrous barked plants and only occurs on Lord Howe Island.

<i>Plectorrhiza tridentata</i>

Plectorrhiza tridentata, commonly known as the common tangle orchid, is an epiphytic or lithophytic orchid that has many coarse, tangled roots, up to twenty egg-shaped leaves and up to fifteen green or brown, star-shaped flowers with a white labellum. It grows on rainforest trees and in other humid places and occurs between the Daintree National Park in Queensland and the far north-eastern corner of Victoria.

<i>Dendrobium nindii</i> Species of orchid

Dendrobium nindii, commonly known as the blue antler orchid, is an epiphytic or lithophytic orchid in the family Orchidaceae. It has erect, cylindrical, leafy pseudobulbs with leathery, dark green leaves and up to twenty mauve or violet flowers with darker veins on the labellum. This antler orchid occurs in tropical North Queensland and New Guinea.

<i>Dendrobium malbrownii</i> Species of orchid

Dendrobium malbrownii, commonly known as the McIlwraith hermit orchid, is an epiphytic or lithophytic orchid in the family Orchidaceae and is endemic to tropical North Queensland, Australia. It has thin, wiry, crowded stems each with narrow, dark green leaves and a single shiny, cream-coloured flower with a purple labellum. It grows on trees, fallen logs and rocks in rainforest on the McIlwraith Range.

Drymoanthus minutus, commonly known as the green midget orchid, is a species of epiphytic or lithophytic orchid that forms small clumps with many thick roots emerging from a thin, erect stem. Between two and five dark green, leathery leaves are arranged along the stem and up to seven minute green to yellowish, star-shaped flowers are arranged on a stiff flowering stem. The sepals and petals are similar to each other and there is a fleshy white, unlobed labellum. This orchid occurs in northern Queensland where it grows in rainforest, usually at higher altitudes.

<i>Plectorrhiza brevilabris</i>

Plectorrhiza brevilabris, commonly known as the small tangle orchid, is an epiphytic or lithophytic orchid endemic to Australia. It has many coarse, wiry roots, between three and nine bright green leaves and up to twenty green, star-shaped flowers with reddish brown markings and a white patch on the labellum. It grows in rainforest on trees, shrubs and occasionally on rocks and occurs on the near coastal ranges of eastern Queensland.

<i>Pomatocalpa marsupiale</i>

Pomatocalpa marsupiale, commonly known as the branched bladder orchid, is an epiphytic or lithophytic orchid that forms large clumps. It has many thick roots, branched stems, many strap-like, leathery leaves and up to many upward-facing green flowers with a cream-coloured or yellowish labellum. It usually grows on high on rainforest trees and is found between Sulawesi and tropical North Queensland, Australia.

<i>Rhinerrhizopsis</i> Genus of orchids

Rhinerrhizopsis, commonly known as freckle orchids, is a genus of three species from the orchid family, Orchidaceae. Plants in this genus are epiphytes with smooth, thin roots, fleshy or leathery leaves and a large number of small, round, short-lived flowers with a three-lobed labellum. These orchids are found in the Bismarck Archipelago, the Solomon Islands, New Guinea and tropical North Queensland, Australia.

<i>Taeniophyllum lobatum</i> Species of orchid

Taeniophyllum lobatum, commonly known as the yellow ribbonroot, is a species of leafless epiphytic or lithophytic orchid that forms small clumps. It has short stems, flattened pale to greyish green roots pressed against the substrate on which it is growing and usually two pale to bright yellow flowers. It only occurs in tropical North Queensland.

<i>Thrixspermum congestum</i> Species of orchid

Thrixspermum congestum, commonly known as the cupped hairseed, is an epiphytic or lithophytic orchid that forms small clumps with many thin roots, up to fifteen leathery leaves and many star-shaped white or cream-coloured flowers. This orchid occurs from Papuasia to northern Australia.

<i>Trichoglottis australiensis</i> Species of orchid

Trichoglottis australiensis, commonly known as the weeping cherub orchid, is an epiphytic or lithophytic clump-forming orchid. It has thick, cord-like roots, flattened, branching stems, many thick, leathery, glossy leaves and between two and six creamy yellow flowers with reddish blotches. This orchid only occurs in tropical North Queensland.

References

  1. "Plectorrhiza". World Checklist of Selected Plant Families (WCSP). Royal Botanic Gardens, Kew.
  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. 441. ISBN   1877069124.
  3. "Plectorrhiza". APNI. Retrieved 27 December 2018.