27 slides labelled "Diseases". Some individually labelled. Some also labelled "D. Johnstone". 8 June 2000. 1-4. appear to be part of B20.0157. 6-12 Cypress Canker. 13. Teprioadium. 14. "Paint" fungus. 15. Tremetes versicolour. 16. Armillaria (old). 17-18. Laetiporus portentotus. 20. Poplar 95 formes. d. johnstone, arboriculture, tree diseases, cypress canker, teprioadium, tremetes versicolour, armillaria, poplar 95 formes, laetiporus potentotus