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Buddleja macrostachya is a large deciduous shrub or small tree with a vast distribution, from Xizang (Tibet) through western China, Bhutan, Sikkim, northern India, Bangladesh, Myanmar (Burma), to Thailand and Vietnam, growing in scrub on mountain slopes to an altitude of 3,200 m, and along rivers in forests. The species was named and described by Wallich ex Bentham in 1835.
Leeuwenberg sank several species (see Synonyms) as macrostachya owing to the similarity of the individual flowers, whilst acknowledging that the structure of the inflorescences varied, from continuous (e.g. B. cylindrostachya) to interrupted (e.g. B. hookeri); he also considered macrostachya very closely allied to B. forrestii.
Buddleja macrostachya is not entirely frost hardy, and remains rare in cultivation. It is best planted against a south-facing wall in the UK; however, two specimens are known to have grown with such vigour as to necessitate felling to prevent structural damage. Several small potted plants feature in the NCCPG collection of Buddleja held by the Longstock Park Nursery, near Stockbridge. Hardiness: USDA zones 9–10.
Buddleja acuminata · Himalayan Butterfly Bush · Buddleja alata · Buddleja albiflora · Fountain butterflybush · Buddleja americana · Buddleja anchoensis · Buddleja araucana · Buddleja aromatica · Dogtail · Weeping Sagewood · Buddleja axillaris
Text excerpted from the Wikipedia article Buddleja macrostachya by its contributors, under CC BY-SA 4.0; the excerpts are shared under the same licence.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.
