Perennation of <i>Sclerotium rolfsii</i> var. <i>delphinii</i> in Iowa

Fig. 2. Browning and softening of petiole bases of hosta caused by petiole rot, and sclerotia of S. rolfsii var. delphinii.



Image from Plant Health Progress article:
Perennation of Sclerotium rolfsii var. delphinii in Iowa