Inside this Issue
The Cover (Harpullia arborea)
Arboretum Notes
The Study of Fire-Retardance in Plants
By P. C. Cheo and Kenneth R. Montgomery
Fire-Retardant Plants For Brush Fire Prevention in Hillside Recreational Areas
By Kenneth R. Montgomery and P. C. Cheo
Mulching vs. Lawns at the Arboretum - Part II
By Francis Ching
Horticultural Photography
By Ralph D. Cornell
Calendar 1970
Speaking for the Foundation
By Ernest Hetherington
