Periglandula, a new fungal genus within the Clavicipitaceae and its association with Convolvulaceae.

We describe two newly discovered fungi living on the adaxial leaf surface of plants belonging to the Convolvulaceae, Ipomoea asarifolia and Turbina corymbosa. The fungi apparently are epibionts because hyphae were never observed to penetrate epidermal cells or stomata of their respective host plants, and most remarkably are intimately associated with secretory glands on the leaf surface. Hyphae and structures resembling chlamydospores and synnemata (but lacking conidia), formed by both fungal species are phenotypically nearly indistinguishable after in vitro growth or when examined in vivo on the leaf surface.