Rhododendron dauricum

Rhododendron dauricum
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Ericales
Family:	Ericaceae
Genus:	Rhododendron
Species:	R. dauricum
Binomial name
	Rhododendron dauricum; L.
Synonyms
	List Azalea daurica (L.) Kuntze; Azalea dahurica K.Koch; Rhododendron atrovirens (Ker Gawl.) Tagg; Rhododendron dauricum f. albiflorum Turcz.) Y.C.Zhu; Rhododendron dauricum var. atrovirens Ker Gawl.; Rhododendron dauricum subsp. ledebourii (Pojark.) Alexandrova & P.A.Schmidt; Rhododendron dauricum var. pallidum Regel; Rhododendron dauricum var. roseum DC.; Rhododendron dauricum var. sempervirens Sims; Rhododendron ledebourii Pojark.;

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.

Description

Growing 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

R. 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

R. 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

^ 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.

Bibliography

[FoC-1] 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.

[RHSLG-2] Harrison, Lorraine (2012). RHS Latin for Gardeners. United Kingdom: Mitchell Beazley. ISBN 978-1845337315.

[3] Description of Rhododendron dauricum. American Rhododendron Society

[RHSPF-4] "RHS Plantfinder - Rhododendron dauricum 'Mid-winter'". Retrieved 8 October 2018.

[5] 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.

[6] "AGM Plants - Ornamental" (PDF). Royal Horticultural Society. July 2017. p. 85. Retrieved 8 October 2018.

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