Rhododendron dauricum is a species of flowering plant in the heath family Ericaceae native to forests and forest margins in Eastern Siberia, Mongolia, North China and Hokkaido, Japan.[1] The Latin specific epithet dauricum means "from Siberia"[2]: 70 – Transbaikal is also known as Dauria.
| Rhododendron dauricum | |
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Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Ericales |
| Family: | Ericaceae |
| Genus: | Rhododendron |
| Species: | R. dauricum
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| Binomial name | |
| Rhododendron dauricum | |
| Synonyms | |
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List
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Description
editGrowing to 1.5 m (5 ft) tall and broad, it is a compact semi-evergreen shrub with purple flowers which open in late winter or early spring, before the dark green leaves appear.[3][4]
Phytochemistry
editR. dauricum contains monoterpenoids daurichromenic acid (DCA) and confluentin (decarboxylated DCA) as well as rhododaurichromenic acids A and B which are structurally related to Cannabichromene.[5]
Cultivation
editR. dauricum is the basis of the PJM hybrid (Rhododendron dauricum × Rhododendron carolinianum).
The cultivar 'Mid-winter', with bright pink flowers, has gained the Royal Horticultural Society's Award of Garden Merit.[4][6] It is hardy down to −20 °C (−4 °F), but like all rhododendrons requires a sheltered position in dappled shade and acid soil enriched with leaf mould.
References
edit- ^ Fang, Ruizheng; Chamberlain, David F. "Rhododendron mucronulatum". Flora of China. Vol. 14. Retrieved 7 October 2018 – via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
- ^ Harrison, Lorraine (2012). RHS Latin for Gardeners. United Kingdom: Mitchell Beazley. ISBN 978-1845337315.
- ^ Description of Rhododendron dauricum. American Rhododendron Society
- ^ a b "RHS Plantfinder - Rhododendron dauricum 'Mid-winter'". Retrieved 8 October 2018.
- ^ Shi, Qing; Li, Teng-Teng; Wu, Yong-Mei; Sun, Xin-Yu; Lei, Chun; Li, Jing-Ya; Hou, Ai-Jun (1 December 2020). "Meroterpenoids with diverse structures and anti-inflammatory activities from Rhododendron anthopogonoides". Phytochemistry. 180: 112524. doi:10.1016/j.phytochem.2020.112524. PMID 33038550. S2CID 222280745.
- ^ "AGM Plants - Ornamental" (PDF). Royal Horticultural Society. July 2017. p. 85. Retrieved 8 October 2018.