Buddleja fallowiana

Buddleja fallowiana
File:Fallowiana inflorescence 1.jpg
Buddleja fallowiana Longstock Park nursery, UK
Scientific classification
Kingdom:	Plantae
(unranked):	Angiosperms
(unranked):	Eudicots
(unranked):	Asterids
Order:	Lamiales
Family:	Buddlejaceae
Genus:	Buddleja
Species:	B. fallowiana
Binomial name
Buddleja fallowiana Balf. f. & W. W. Sm.
Synonyms
Buddleja fallowiana var. alba Sabourin

Buddleja fallowiana is a species of flowering plant endemic to the Yunnan province of western China, where it grows in open woodland, along forest edges and watercourses. The plant was collected in China by Forrest in 1906, and named in 1917 by Balfour & Smith for George Fallow, a gardener at the Royal Botanic Garden Edinburgh who had died in Egypt in 1915 from wounds sustained fighting in the Gallipoli Campaign.

Description

B. fallowiana is a deciduous shrub typically growing to a height of 4 m (13 ft); of loose habit, the young shoots are clothed with a dense white felt. The ovate to narrowly elliptic leaves are 4 – 13 cm long by 1 – 6 cm wide, acuminate or acute at the apex; the upper and lower surfaces densely tomentose, bestowing a silvery grey sheen. The inflorescences are slender thyrsoid, sometimes interrupted, panicles at the ends of the current year's shoots, 5 – 15 cm long by 2 – 3 cm wide, comprising fragrant lavender - blue flowers with orange throats, the corollas 2 – 3.5 mm wide by 9 – 14 mm long with erect lobes. The flowers bloom in late summer and autumn.

Growth is significantly slower than that of B. davidii; Bean considered the species more closely allied to B. nivea, although its chromosome number, 2n = 76 (tetraploid), places it alongside the similarly tetraploid B. davidii.

• Buddleja fallowiana leaf.jpg
• Fallowiana inflorescence 2.jpg

Cultivation

Somewhat tender, B. fallowiana is best grown against a wall. However, if cut to the ground by frost, it will grow again from the base. Hardiness: USDA zones 8–9.

Varieties

• Buddleja fallowiana var. alba.

The variety was considered horticulturally superior to B. fallowiana by Bean, who thought it one of the most attractive of all Buddlejas; it was accorded the Royal Horticultural Society's Award of Garden Merit in 1993. However, its varietal status was challenged by Leeuwenberg, who considered its colouration insufficient to justify it as a variety, and sank it as simply B. fallowiana.

Hybrid cultivars

A number of hybrid cultivars have been raised, invariably through a crossing of the species with Buddleja davidii:

• Buddleja 'Ingeborg'
• Buddleja 'Lochinch'
• Buddleja 'Mayford Purple'
• Buddleja 'Vashon Skies'
• Buddleja 'West Hill'

References

• 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

• Bean, W. J. (1917). Trees and shrubs hardy in Great Britain, 7th edition. Murray, London.
• Sabourin, L. (1929). Le Buddleja fallowiana et sa variété alba. Revue Horticole, pp. 418-420, Vol. 101. 1929.
• 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.
• Stuart, D. D. (2006). Buddlejas. RHS Plant Guide. Timber Press, Oregon. ISBN 978-0-88192-688-0