Buddleja colvilei is endemic to the eastern Himalaya; discovered by Hooker in 1849, he declared it 'the handsomest of all Himalayan shrubs'  The species was awarded the RHS First Class Certificate (FCC) in 1896. 
B. colvilei is a deciduous large shrub or small tree which can grow > 13 m, often single stemmed. The flowers are arranged in drooping panicles, 15–20 cm long by > 8 cm wide, rose pink to crimson, but often white within the corolla tube. The flowers are among the largest of any in the genus, and appear in June. The leaves are < 25 cm long, narrow, shallowly - toothed, and tapered at either end. This species has a high degree of polyploidy with a correspondingly high chromosome number of 2n = 152–456 (8x–24x).
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