Title: Kenneth Peck counting rings and explaining Phloem necrosis disease to his nature study class.
Description: Kenneth Peck counting rings and explaining Phloem necrosis disease to his nature study class.. Daniel Boone elm seedling. 45 years old. MBG Bull 56(6):9 (Nov.-Dec. 1968). Photo by Renyold Ferguson. St. Louis Post-Dispatch.
Kenneth Peck counting rings and explaining Phloem necrosis disease to his nature study class.. Daniel Boone elm seedling. 45 years old. MBG Bull 56(6):9 (Nov.-Dec. 1968). Photo by Renyold Ferguson. St. Louis Post-Dispatch.