Moist soil in full sun.
Description and Distribution:
Xizang, W Yunnan, Bhutan, NE India, Myanmar, Nepal and Sikkim. A species that grows between 40 and 60cm in height. It has grey-green leaves, long and thin green stem and violet, to dark blue, to blue or reddish purple flowers.
This species is named for Charles Clarke. Englishman Mr. Clarke (17 June 1832 – 25 August 1906) was a lawyer and botanist. He was educated at Kings College London. He studied law and was admitted to the bar in 1860. He lectured in mathematics at Presidency College Kolkata from 1857 to 1865. Clarke was Inspector of Schools in East Bengal and later of India. From 1869 to 1871 he was superintendent of the Calcutta Botanical Garden. He retired in 1887 and returned to England to work at Kew Gardens until his death in 1906.