Inside this Issue
Department Notes
Smog-Tolerant Petunias
By George P. Hanson, Daniel H. Addis, and Linda Thorne
Plant Portraits: Sequoiadendron
By Leonid Enari
Hydroponics, Principles and Guidelines
By Wade L. Berry
Tall Tree and Test Tubes
By Wayne Loescher
A Landfill Botanic Garden
By Armand Sarinana
Bookshelf
Stigmaphyllon affine (Cover)
Arboretum Weather
