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Buddleja nivea : ウィキペディア英語版 | Buddleja nivea
''Buddleja nivea'' is a vigorous shrub endemic to western China, evergreen in the wild, but deciduous in cultivation in the UK. The plant was discovered by Wilson in the Yangtse basin at altitudes of 700 – 3,600 m. Introduced to cultivation in 1901, it was named by Duthie in 1905.〔Bean, W. J. (1970). ''Trees & Shrubs Hardy in the British Isles, 8th ed., Vol. 1.'' (2nd impression 1976) London 〕〔Stuart, D. (2006). ''Buddlejas''. RHS Plant Collector Guide. Timber Press, Oregon, USA. ISBN 978-0-88192-688-0〕 Several plants similar to the species but originally treated as species and varieties in their own right have now been sunk as ''B. nivea'' (see Synonyms).〔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 978-0-915279-37-1 vol. 15 (1996): (online at www.efloras.org )〕 ==Description==
''B. nivea'' reaches 1 – 3 m high, and is chiefly distinguished by the dense white indumentum covering the branchlets, calyxes, and undersides of the leaves. The lanceolate leaves are of variable size, 6 – 22 cm long by 1.5 – 11 cm wide; they are acute or acuminate at the apex, rounded at the base, and very coarsely toothed except at the apex. The insignificant, faintly-scented flowers have short corollas 6 – 8 mm long, with only the erect lobes visible above the indumentum. The flowers range in colour from pink to purple, and are arranged as narrow terminal panicles, < 25 cm long, appearing in summer. 〔Leeuwenberg, A. J. M. (1979) ''The Loganiaceae of Africa XVIII Buddleja L. II, Revision of the African & Asiatic species''. H. Veenman & Zonen, Wageningen, Nederland.〕 ''B.nivea'' is generally hexaploid (chromosome number 2''n'' = 114), although plants identified as ''B.macrostachya'' may be hexaploid or dodecaploid (2''n''=228). 〔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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