Buddleja officinalis

Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Cladus: Asterids
Cladus: Lamiids
Ordo: Lamiales

Familia: Scrophulariaceae
Tribus: Buddlejeae
Genus: Buddleja
Sectio: Buddleja sect. Alternifoliae
Species: Buddleja officinalis
Name

Buddleja officinalis Maxim.
References

Bull. Acad. Imp. Sci. Saint-Pétersbourg 26:496; Mélanges Biol. Bull. Phys.-Math. Acad. Imp. Sci. Saint-Pétersbourg 10:675. 1880 (Diagn. pl. nov. asiat.)
USDA, ARS, Germplasm Resources Information Network. Buddleja officinalis in the Germplasm Resources Information Network (GRIN), U.S. Department of Agriculture Agricultural Research Service. Accessed: 07-Oct-06.

Buddleja officinalis is a deciduous early-spring flowering shrub native to west Hubei, Sichuan, and Yunnan provinces in China.[1] Discovered in 1875 by Pavel Piasetski,[2] a surgeon in the Russian army, B. officinalis was named and described by Maximowicz in 1880. Introduced to western cultivation in 1908, B. officinalis was accorded the Royal Horticultural Society's Award of Merit three years later,[3] and the Award of Garden Merit (record 689) in 2002.[4]
Description

Buddleja officinalis largely resembles the commoner B. davidii in shape and size, growing to less than 2.5 m in height. The inflorescences are honey-scented mauve panicles, shorter (under 8 cm) than those of davidii, and more conical. The leaves are lanceolate, under 15 cm long, softly pubescent, the upper surface rich green in colour, the underside grey.[1] 2n = 38.[5]
Cultivation

Buddleja officinalis is not fully frost hardy, unable to survive temperatures lower than −10° C, and is best grown against a south-facing wall.[1] The shrub should be cut back hard each year immediately after flowering in spring. Propagation by softwood cuttings is easily accomplished, using vermiculite as a rooting medium.

In the UK the shrub is often grown as a nectar source for vanessid butterflies such as the peacock on emergence from hibernation.[6] Hardiness: RHS H2, USDA zones 8 – 9.
References

Phillips, R. & Rix, M. (1989). Shrubs. Pan Books, London. ISBN 0-330-30258-2
Bryce, W. J. (2007). Pavel Yakovlevich Pyatsetski (1843 – 1919): his botanical collections in China (1875) and paintings of Chinese gardens. Archives of Natural History. Vol. 39, 171–174. ISSN 0260-9541, E-ISSN 1755-6260. Edinburgh University Press.
Hillier & Sons. (1977). Hilliers' Manual of Trees and Shrubs, 4th Edition. David & Charles, Newton Abbot, England. ISBN 0-7153-7460-5
"RHS Plantfinder - Buddleja officinalis". Royal Horticultural Society. Retrieved 21 January 2018.
Chen, G, Sun, W-B, & Sun, H. (2007). Ploidy variation in Buddleja L. (Buddlejaceae) in the Sino - Himalayan region and its biogeographical implications. Botanical Journal of the Linnean Society. 2007, 154, 305 – 312. The Linnean Society of London.

Brookes, A. H. (2007). Winter flowering buddlejas. Plant Heritage: Hampshire and Isle of Wight Group, Spring 2007.. Plant Heritage, UK.

Leeuwenberg, A. J. M. (1979) The Loganiaceae of Africa XVIII Buddleja L. II, Revision of the African & Asiatic species. H. Veenman & Zonen, Wageningen, Nederland.
Li, P. T. & Leeuwenberg, A. J. M. (1996). Loganiaceae, in Wu, Z. & Raven, P. (eds) Flora of China, Vol. 15. Science Press, Beijing, and Missouri Botanical Garden Press, St. Louis, USA. ISBN 978-0915279371 online at www.efloras.org