Phytophthora pseudosyringae composed only of cellulose and glucans. Its name derives from Greek "Phytophthora" (), “plant” and (), “destruction”; “the plant-destroyer” and "plurivora" and from Latin ( = many, - = feeding). Phytophthora pseudosyringae Phytophthora pseudosyringae is a semi-papillate homothallic soil-borne plant pathogen causing root and collar rot of deciduous tree species in Europe. It is associated with necrotic fine roots and stem necroses of "Fagus sylvatica" and "Alnus glutinosa", and isolates are moderately aggressive to fine roots of oaks and beech ("Nothofagus"), highly aggressive to holly leaves and apple fruits, and slightly pathogenic to alder bark. It belongs to the class
Carex sylvatica York and North Carolina, and to New Zealand, where it was first recorded in 1969. In its native range, "C. sylvatica" lives in deciduous woodlands on heavy soils; it is sometimes found in unwooded areas, but usually only as a relic of ancient woodland. In North America, it is generally found in disturbed areas within deciduous woodland. "Carex sylvatica" was first described by the English botanist William Hudson in his 1762 work "Flora Anglica". Hybrids have been reported between "C. sylvatica" and "C. strigosa" (in France) and between "C. sylvatica" and "C. hirta" (in Austria). Its English common name is