References
Fernald, M.L. 1950. Gray's manual of botany, eighth (centennial) edition. Corrected printing, 1970. D. Van Nostrand Co., New York, N.Y. Google Scholar
Fernald, M.L. 1950. Gray's manual of botany, eighth (centennial) edition. Corrected printing, 1970. D. Van Nostrand Co., New York, N.Y. Google Scholar