SUMMARYCulture experiments have proved that, as Juel first reported,Volutella BuxiandVerticillium Buxiare distinct species. Attention is called to a number of exsiccati specimens variously distributed asPenicillium roseum, Volutella Buxi, Verticillium Buxi, Mucor hyalinusand otherwise. It was pointed out that the stiff hairs or setae ofVolutella Buxiare often capped with ruby-red beads which harden on drying. Hairs of the same type are often present on ascocarps ofNectriella Rousselianaand this is taken as better proof for a connection between the two forms than their mere presence on the same leaves.The great variability in the size of the conidia of theVolutella, the presence and absence of hairs on sporodochia, the early development of conidia in drops of water suggestingCephalosporiumorAcrostalagmus, the different rates of growth of certain isolates, the great change of growth types in cultures derived from transplants from old cultures, are all questions calling for further study. Regardless of whether we may be dealing with different races or even species of what we have referred to in this paper as“Volutella”on boxwood, there can be no question that Juel was right in saying thatVerticillium Buxiis an entirely distinct species.