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Buddleja perfoliata : ウィキペディア英語版 | Buddleja perfoliata
''Buddleja perfoliata'' is endemic to the xerophytic and subzerophytic grasslands of central Mexico at elevations of 1500 – 2700 m. The species was first named and described by Kunth in 1818. 〔Kunth, in Humboldt, Bonpland, and Kunth. (1818). ''Nov. gen. sp., ed. fol.'' 2:284, ed. quar. 2:353〕 〔Norman, E. M. (2000). Buddlejaceae. ''Flora Neotropica 81'', pp. 135 - 141. New York Botanical Garden, USA〕 ==Description== ''B. perfoliata'' is a small dioecious shrub 0.8 – 2 m tall in the wild, much branched, and with a greyish-black shredding bark. The young branches are subquadrangular and tomentose, bearing sessile lanceolate to elliptic opposite subcoriaceous leaves, rugose above with dense felt-like tomentum covering both surfaces. The yellow inflorescences, redolent of sage, are 5 – 25 cm long, comprising 5 – 26 pairs of heads borne in the axils of the leaves, each head about 1 cm in diameter with 30 – 40 flowers. Ploidy: ''2n'' = 38. 〔
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