Buddleja jamesonii is a species endemic to southern Ecuador, where it grows in moist, protected ravines and borders of tussocks at elevations of 3,000 – 4,000 m.Norman, E. M. (2000). Buddlejaceae. Flora Neotropica 81. New York Botanical Garden, USA The species, first named and described by Bentham in 1846,Bentham, G. (1846). D C., Prodromus 10: 441. 1846. is now threatened by habitat loss. The specific name commemorates the Scottish botanist William Jameson (1796–1873) who collected in Ecuador.Harvard University Herbarium Index of Botanists. .
Description Buddleja jamesonii is a trioecious shrub 0.5 – 1.5 m high with greyish fissured bark at the base. The stems are subquadrangular and lanose, crowded with leaves on short axillary branches. The leaves are sessile, lanceolate and comparatively small, 3 – 4 cm long by 1 – 2 cm wide, lanose on both sides. The cream inflorescence typically comprises just one terminal head, occasionally with a pair of additional sessile heads, each 0.8 – 1.6 cm in diameter, with 15 – 30 flowers. The corolla is 3.5 – 4.5 mm long.
Cultivation The shrub is not known to be in cultivation.
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