Roussoella, an ascomycete genus of uncertain relationships with a Cytoplea anamorph

Roussoella is typified by the species now known as K. hysterioides which is redescribed from bamboo. In Roussoella the asci are thin-walled, bitunicate, but probably not fissitunicate, with an I- ring, while the paraphysoids are narrow. Ascospores are brown, two-celled, ornamented, and surrounded by a mucilaginous sheath. ?he anamorph is described as Cytoplea hysterioides sp. nov., which was grown in culture and for which a full description is given. Roussoella nitidula, with similar asci and ascospores, is confirmed as synonymous with R. hysterioides.