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The Pleione David Don, 1825 is a small genus of about twenty, beautiful, predominantly terrestrial, but sometimes epiphytic or lithophytic miniature orchids.
This genus was named after Pleione, mother of the Pleiades (in Greek mythology). It has several common names : Peacock Orchid, Glory of the East, Himalayan Crocus, Indian Crocus, and Windowsill Orchid
They are distributed in the mountains and foothills of Himalaya, India, Myanmar, Thailand, Laos, Vietnam, and China. They are well adapted to cold temperatures and even frost. A few, however, prefer warmer temperatures. They grow in well-drained habitats and on rocks covered with moss at altitudes bewteen 600 and 4200 m.
The sympodial growth habit of terrestrial Pleione orchids is rather unique. They have relatively large, spongy, almost globular or ampulliform pseudobulbs, narrowed at the apex. Every pseudobulb is only active for one year and carries one or two pleated parallel-veined leaves, with a length of 15-30 cm. These drop off before winter. The pseudobulb stays dormant, till a new one starts to develop. This one produces new roots and a short pedicel. This pseudobulb remains active till the end of the bloom. Then the whole cycle starts all over again.
The big, showy flowers originate from the top of the pseudobulb. They are pink to purplish, while the fringed, tubular lip is paler or white, with yellow, red or purple dots and stripes. The flowers of the mountain species start blooming in spring, while the new shoots develop. The flowers of the orchids, growing in warmer climates, bloom in autumn, when the leaves have dropped.
They are very closely related to the equally beautiful genus Coelogyne and were once considered part of it.
They are easily grown by the layman, easy to propagate and are among the most popular orchids. They are much in demand for hybridization.
Species
- Pleione albiflora (China - W. Yunnan to N. Myanmar).
- Pleione aurita (China - W. Yunnan).
- Pleione braemii (China - Yunnan).
- Pleione bulbocodioides (C. China to SE. Tibet)
- Pleione chunii (S. China).
- Pleione coronaria (C. Nepal).
- Pleione formosana : Taiwan Pleione (SE. China, N. & C. Taiwan).
- Pleione forrestii (China - NW. Yunnan)- to N. Myanmar).
- Pleione grandiflora (China (- S. Yunnan to NW. Vietnam).
- Pleione hookeriana (Nepal to China - SE. Yunnan to N. Guangdong- to Indo-China)
- Pleione humilis (C. Himalaya to Myanmar).
- Pleione limprichtii : Hardy Chinese Orchid (China - C. Sichuan).
- Pleione maculata (C. Himalaya to China - W. Yunnan).
- Pleione microphylla (China - Guangdong).
- Pleione pleionoides (C. China).
- Pleione praecox (WC. Himalaya to China - S. Yunnan). (type species)
- Pleione saxicola (E. Bhutan to China - NW. Yunnan).
- Pleione scopulorum (India - NE. Arunachal Pradesh to China - NW. Yunnan).
- Pleione vietnamensis (SC. Vietnam).
- Pleione yunnanensis (SC. China to N. Myanmar).
It has been suggested that P. bulbocodioides, P. limprichtii and P. pleionoides could all be the same species.
Currently, there are two sections in the genus Pleione
- section Pleione (includes the autumn-flowered species) : P. x lagenaria, P. maculata, P. praecox, and P. saxicola.
- section Humiles (includes the spring-flowering species) : P. albiflora, P. bulbocodioides, P. chunii, P. x confusa, P. coronaria, P. formosana, P. forrestii,¨P. grandiflora, P. hookeriana, P. praecox, P. x kohlsii, P. limprichtii, P. pleionoides, P. scopulorum, P. yunnanensis.
Natural hybrids
- Pleione × barbarae (P. bulbocodioides × P. grandiflora) (China - SE. Yunnan to N. Vietnam).
- Pleione × christianii (P. bulbocodioides × P. forrestii) (China - W. Yunnan).
- Pleione × confusa (P. albiflora × P. forrestii) (China - W. Yunnan).
- Pleione × kohlsii (P. aurita × P. forrestii) (China - W. Yunnan).
- Pleione × lagenaria (P. maculata × P. praecox).(Assam to China - W. Yunnan).
- Pleione × taliensis (P. bulbocodioides × P. yunnanensis) (China - W. Yunnan).
Reference
- Phillip Cribb & Ian Butterfield : The Genus Pleione" (Second Edition 1999) Natural History Publications in association with the Royal Botanic Gardens, Kew. ISBN 983-812-040-5
- C. Z. Tang & I. Butterfield. 1983. The genus Pleione. Curtiss Bot. Mag. 184: 93--147.
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