Fagus mexicana Fagus mexicana Fagus mexicana, the Mexican beech or haya, is a species of beech endemic to northeastern and central Mexico, where it occurs from southwest Tamaulipas south to Hidalgo and Puebla. It is restricted to high altitude cloud forests in the Sierra Madre Oriental. It is closely related to the American beech "Fagus grandifolia" and is usually treated as "Fagus grandifolia" subsp. "mexicana" (Martínez) E.Murray. "Fagus mexicana" is a deciduous tree, reaching heights of 25–40 m tall and up to 1 m trunk diameter. The leaves are alternate and simple, with a slightly toothed margin, usually smaller than those of
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