SUMMARYThe presence and distribution of Gonatorrhodiella Highlei A. L. Smith, one of the rarer members of the Fungi Imperfecti collected originally in England on onion bulbs, are reported for the first time in the United States.G. Highlei is particularly interesting not only because of its unusual morphology, but also because of its association with Nectria coccinea, which together with Cryptococcus Fagi is concerned with the beech bark disease of our native beech (Fagus grandifolia) in New England.A comparison of Gonatorrhodiella Highlei was made with G. parasitica and other species of this genus. As a result of these studies, it was concluded that at present there are only two valid species of Gonatorrhodiella, G. parasitica and G. Highlei, known. Two other species have been described, but G. eximia seems to be synonymous with G. parasitica, while G. coccorum is not a member of the genus.Gonatorrhodiella Highlei produced only a scant mycelial growth and a few conidiophores on synthetic malt and only a trace of vegetative growth on potato, potato-dextrose, and malt agars. But it grew luxuriantly and produced an abundance of conidiophores on a medium consisting of 20 grams of oatmeal and 60 cc. of distilled water.When planted with Nectria coccinea, N. galligena, or N. cucurbitula on potato, potato-dextrose, or malt-extract agar, Gonatorrhodiella Highlei grew abundantly and produced numerous fertile hyphae. It failed to grow, however, when it was planted on the same media with either N. Coryli or N. cinnabarina.