In an address in January, before the Massachusetts Horticultural Society, Col. Wilson discussed against the supposed advantages of mulching. Some of his reasons will hardly be concurred in by those who have had experience, or given thought to the subject. But one suggestion at least is worthy further thought, and that is, the encouragement which mulching gives to parasitic fungi. Those who have had occasion to use mulch know how "fousty " the surface of the ground becomes, and it has been placed on record in our pages, that a mulch of dry leaves has generated fungus that has afterwards seized on and eaten off the stems of Rhododendrons.