Rhynchostylis
Rhynchostylis retusa
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Orchidaceae
Subfamily: Epidendroideae
Tribe: Vandeae
Subtribe: Aeridinae
Genus: Rhynchostylis
Blume
Type species
Rhynchostylis retusa
(Sw.) Blume.
Synonyms[1]

Anota Schltr.

Rhynchostylis (abbreviated Rhy in the horticultural trade) is a genus in the orchid family (Orchidaceae), closely allied to the genus Vanda (from which it differs in the one-lobed lip of the flower) and comprising four currently accepted species native to the Indian Subcontinent, China, Indochina, Malaysia, Indonesia and the Philippines.[1][2]

Etymology

The name consists of a compound of two Greek elements : rhynchos 'beak' and stylis 'column' – in reference to the very broad, fleshy column of the flower.

Description

The flowers are borne in dense racemes and are noted for their intense, spicy fragrance. Although lacking in pseudobulbs, the plants have leathery leaves that are drought-resistant. These orchids grow naturally in warm, moist, shaded tropical areas and will thrive in cultivation if given consistent warmth, uniform moisture and bright, but indirect light. Hobbyists wanting to grow them will need a warm, humid growing environment with gentle air movement. They can be grown in pots, but are better grown in baskets, owing to the extreme fleshiness of their roots. Their unusually fragrant blooms often appear in the slightly cooler winter months.[3]

Cultivation

Despite being in the Vanda tribe, they are very different from vandas. They grow more slowly, their roots are more fragile, and almost any direct sun will harm them. However, they are typically grown with no potting mix on slat baskets or mounted in the same way as vandas.[4] [5]

Uses

The genus possesses valuable medicinal properties meriting in-depth pharmacological investigation, including antispasmodic and antiseptic activity.[6] Several species have been found to contain alkaloids.[7]

Taxonomy

Placement in subtribe Aeridinae

The Subtribe was changed from Sarcanthinae (Benth, 1881) to Aeridinae (Pfitzer, 1887) in 1972.[8][9]

Species

As of December 2023, four species are recognized:[10]

  • Rhynchostylis gigantea (Lindl.) Ridl. – widespread in Hainan, Andaman Islands, Myanmar, Thailand, Vietnam, Laos, Cambodia, Malaysia, Borneo, Philippines
    • Rhynchostylis gigantea subsp. gigantea – all of species range except Philippines
    • Rhynchostylis gigantea subsp. violacea (Lindl.) Christenson – Philippines
  • Rhynchostylis retusa (L.) Blume – Yunnan, Guizhou, India, Sri Lanka, Nepal, Bhutan, Assam, Bangladesh, Andaman & Nicobar Islands, Indochina, Malaysia, Borneo, Sumatra, Java, Philippines
  • Rhynchostylis rieferi (Higgins) – Philippines
  • Rhynchostylis cymifera Yohannan, J.Mathew & Szlach. [11] - South Western Ghats, India

Formerly included

  • Rhynchostylis coelestis (Rchb.f.) A.H. Kent is now a synonym of Vanda coelestis (Rchb.f.) Motes.[12]

References

  1. 1 2 Kew World Checklist of Selected Plant Families
  2. ↑ Flora of China v 25 p 474, 钻喙兰属 zuan hui lan shu, Rhynchostylis Blume
  3. ↑ The Illustrated Encyclopedia of Orchids ed. Pridgeon, Alec, pub. Lansdowne Publishing Pty Ltd. Australia 1992 and David and Charles UK 2003.ISBN 0 7153 1782 2
  4. ↑ "AOS Sheet on Rhynchostylis Gigantea".
  5. ↑ "Jay's IOSPE on Rhynchostylis".
  6. ↑ Orchid Biology: Reviews and Perspectives, III ed. Arditti, Joseph, pub. Comstock Publishing Associates - a division of Cornell University Press 1984 ISBN 0-8014-1040-1 (v.1) : Chapter 2 : Ethnobotany of the Orchidaceae by Lawler, Leonard J. page 101
  7. ↑ Genera Orchidacearum: Epidendroideae edited by Alec M. Pridgeon, Phillip J. Cribb, Finn N. Rasmussen, Mark W. Chase
  8. ↑ Vandeae
  9. ↑ "Molecular phylogenetics of Vandeae (Orchidaceae) and the evolution of leaflessness". Archived from the original on October 21, 2015.
  10. ↑ "Rhynchostylis Blume". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 16 December 2023.
  11. ↑ Jordan J. Biol. Sci. 11(3): 257, figs. 1-2 (2018).
  12. ↑ "Vanda coelestis (Rchb.f.) Motes". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 16 December 2023.


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.