Buddleja yunnanensis

Buddleja yunnanensis
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Lamiales
Family:	Scrophulariaceae
Genus:	Buddleja
Species:	B. yunnanensis
Binomial name
	Buddleja yunnanensis; Gagnep.

Buddleja yunnanensis is a vigorous shrub native to Yunnan and much of the rest of south-western China, where it grows on forest margins, thickets, and along streams at elevations of 1,000 – 2,500 m. The shrub was first described and named by Francois Gagnepain in 1915, however its taxonomy remains a matter of contention.[1][2][3]

Description

Buddleja yunnanensis can exceed 3 m in height. The opposite lanceolate leaves are of variable size, < 12 cm long by 4.5 cm wide. The lilac flowers form short panicles only 6 cm long by 2 cm wide, located at the ends of the shoots.[1] Chromosome number is 2n = 38 (diploid).[4]

Cultivation

Although hardy, the species is very uncommon in cultivation. Hardiness: USDA zone 8.[1]

References

Stuart, D. (2006). Buddlejas. RHS Plant Collector Guide. Timber Press, Oregon, USA. ISBN 978-0-88192-688-0
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
Leeuwenberg, A. J. M. (1979) The Loganiaceae of Africa XVIII Buddleja L. II, Revision of the African & Asiatic species. H. Veenman & Zonen, Wageningen, Nederland.
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.

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[Stuart-1] Stuart, D. (2006). Buddlejas. RHS Plant Collector Guide. Timber Press, Oregon, USA. ISBN 978-0-88192-688-0

[Li-2] 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

[Leeuwenberg-3] Leeuwenberg, A. J. M. (1979) The Loganiaceae of Africa XVIII Buddleja L. II, Revision of the African & Asiatic species. H. Veenman & Zonen, Wageningen, Nederland.

[Chen-4] 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.