Dendrobium densiflorum explained

Dendrobium densiflorum is a species of epiphytic or lithophytic orchid, native to Asia. It has club-shaped stems, three or four leathery leaves and densely flowered, hanging bunches of relatively large pale yellow and golden yellow flowers.

Description

Dendrobium densiflorum is an epiphytic or lithophytic orchid with stems that are club-shaped, swollen at the base, NaNsigfig=1NaNsigfig=1 long and about 20sigfig=1NaNsigfig=1 wide. There are three or four leathery, oblong to lance-shaped leaves NaNsigfig=1NaNsigfig=1 long and NaNsigfig=1NaNsigfig=1 wide near the end of the stem. A large number of flowers are densely packed around a hanging flowering stem NaNsigfig=1NaNsigfig=1 long. Each flower has a greenish white pedicel and ovary NaNsigfig=1NaNsigfig=1 long. The flowers are NaNsigfig=1NaNsigfig=1 wide with pale yellow sepals and petals and a golden yellow labellum. The sepals are lance-shaped to egg-shaped, NaNsigfig=1NaNsigfig=1 long and NaNsigfig=1NaNsigfig=1 wide. The petals are almost round, NaNsigfig=1NaNsigfig=1 long and NaNsigfig=1NaNsigfig=1 wide with irregular edges on the outer half. The labellum is more or less square to round, NaNsigfig=1NaNsigfig=1 long and wide with a partly woolly surface. The edges of the labellum surround the column.[1]

Taxonomy and naming

Dendrobium densiflorum was first formally described in 1830 by John Lindley and the description was published in Nathaniel Wallich's book, Plantae Asiaticae rariores.[2]

Distribution and habitat

Mi hua shi hu grows in the trunks of broadleaved, evergreen trees and on rocks in mountain valleys at elevations between NaNsigfig=1NaNsigfig=1. It is found in China, Bhutan, northeastern India, Myanmar, Nepal and Thailand.[3] [4] [5] [6]

Dendrobium guibertii and D. amabile are similar species and sometimes confused with D. densiflorum, leading to uncertainty as to the distribution of this species.

Uses

Chemical compounds useful in medicine, including phenanthrenes have been extracted from this orchid.[7] [8]

Notes and References

  1. Web site: Dendrobium densiflorum . Flora of China . 13 November 2018.
  2. Book: Lindley . John . Wallich . Nathaniel . Plantae Asiaticae rariores, or, Descriptions and figures of a select number of unpublished East Indian plants (Volume 1) . 1830 . Treuttel and Wurtz, Treuttel Jun. and Richter . London . 34 . 13 November 2018.
  3. Huda, M.K., Rahman, M.A. & Wil (2001). Notes on the Orchidaceae of Bangladesh. Bangladesh Journal of Plant Taxonomy 8(2): 9-17.
  4. Rahman, M.O. (2004). Second list of angiospermic taxa of Bangladesh not included in Hooker's 'Flora of British India' and Prain's 'Bengal Plants': series I. Bangladesh Journal of Plant Taxonomy 11: 77-82.
  5. Lucksom, S.Z. (2007). The orchids of Sikkim and North East Himalaya: 1-984. S.Z.Lucksom, India.
  6. Raskoti, B.B. (2009). The Orchids of Nepal: 1-252. Bhakta Bahadur Raskoti and Rita Ale.
  7. Kovács . Adriána . Vasas . Andrea . Hohmann . Judit . Natural phenanthrenes and their biological activity . Phytochemistry . March 2008 . 69 . 5 . 1084–1110 . 10.1016/j.phytochem.2007.12.005. 18243254 .
  8. Web site: KNApSAcK Metabolite Information - Moscatin,Plicatol B. kanaya.naist.jp. 15 November 2018.