Buddleja asiatica

Buddleja asiatica is a somewhat tender deciduous shrub native to a vast area of the East Indies, including India, Nepal, Bangladesh, China, Taiwan, Burma, Thailand, Laos, Cambodia, Vietnam, Malaysia, New Guinea, and the Philippines, growing in open woodland at elevations < 2,800 m either as understorey scrub, or as a small tree.[1] First described by Loureiro in 1790, B. asiatica was introduced to the UK in 1874, and accorded the RHS Award of Garden Merit (record 675) in 1993.[2][3] It is highly invasive in Hawaii, Guam, and the Northern Mariana Islands.[4]

Buddleja asiatica
Buddleja asiatica
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Lamiales
Family:	Scrophulariaceae
Genus:	Buddleja
Species:	B. asiatica
Binomial name
Buddleja asiatica Lour.
Synonyms
Buddleja acuminatissima Blume Buddleja amentacea Kränzl. Buddleja arfakensis Kan. et Hat. Buddleja asiatica var. salicina (Lam.) Koorders & Valeton Buddleja asiatica var. breviscupe Koorders Buddleja densiflora Blume Buddleja discolor Roth. Buddleja neemda Buch.-Ham. ex. Roxb.M Buddleja neemda var. phillipensis Cham. et Schlecht. Buddleja nimda Buch.-Ham. ex. Roem et Schult. Buddleja salicina Lam. Buddleja serrulata Roth. Buddleja subserrata D. Don. Buddleja sundaica Blume Buddleja virgata Blanco (in error) Vitex esquirolii Lévl.

Given the huge range of the species, it has inevitably acquired a long list of synonyms.[5]

Description

Buddleja asiatica can grow < 7 m tall in the wild. The leaves are usually narrowly lanceolate to ovoid, < 30 cm long, attached by petioles 15 mm long, to branches round in section. The sweetly scented flowers are usually white, occasionally pale violet, and borne in late winter at the ends of the long, lax branches in slender panicles, the size of which can vary widely according to source.[1] Ploidy: 2n = 38 (diploid).[6]

Cultivation

Buddleja asiatica is not completely hardy in the UK, but can be grown reliably against a south-facing wall in coastal areas of the south and west, where it tolerates temperatures down to around 0 °C (32 °F). A specimen is grown under glass by Longstock Park Nursery, near Stockbridge, Hampshire, one of the four NCCPG national collection holders. Hardiness: RHS H3,[2] USDA zones 9–10.[1] Owing to its wide ecological range, adaptation to disturbed areas, elevation and rainfall tolerance, it readily naturalizes in tropical regions and can become invasive.[4]

Uses

In Nepal leaves of B. asiatica are collected as fodder for domesticated animals, and the trunk is cut for firewood. During Thangmi wedding rituals, the female relatives of the groom wear necklaces made of the white flower.[7]

References

1. Stuart, D. (2006). Buddlejas. Plant Collector Guide. Timber Press, Oregon, USA. ISBN 978-0-88192-688-0
2. "RHS Plantfinder - Buddleja asiatica". Retrieved 12 January 2018.
3. Hillier Nurseries (1977). Hilliers' Manual of Trees & Shrubs. David & Charles, Newton Abbot. ISBN 0-7153-6744-7
4. "Buddleja asiatica: info from PIER (PIER species info)". Hawaii Ecosystems At Risk. Retrieved 12 March 2018.
5. Leeuwenberg, A. J. M. (1979) The Loganiaceae of Africa XVIII Buddleja L. II, Revision of the African & Asiatic species. H. Veenman & Zonen, Wageningen, Nederland.
6. 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.
7. Turin, Mark. "ETHNOBOTANICAL NOTES ON THANGMI PLANT NAMES AND THEIR MEDICINAL AND RITUAL USES" (PDF). www.digitalhimalaya.com. www.digitalhimalaya.com. Retrieved 17 November 2013.

• 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