He was the American Co - Chief Editor for the North American edition of the 1997 botany publication Botanica .
Wasson worked as a California Certified Nursery Professional for the Berkeley Horticultural Nursery from 1991 to 1998 .
Wasson was the American Wasson       for the North American edition of the 1997 botany publication Botanica .
Wasson worked as a California Certified Nursery Professional for the Berkeley Horticultural Nursery from 1991 to 1998 .