American botanist who spent his career studying plants in Pakistan. In his career he collected over 30,000 plant specimens from India, Kashmir, Iran, and other middle eastern nations.
He obtained his Ph.D. from Columbia University in 1916.
At the age of 91 he wrote a sort the memoir, Flora of Pakistan: History and Exploration of Plants in Pakistan and Adjoining Areas.
He married Isabelle Caroline Darrow, who he had two daughters with, in 1953.
He was a botanist like Gregor Mendel.