Pterostyrax psilophylla
It is a deciduous small tree growing to 15 m tall, with a trunk up to 45 cm diameter. The leaves are alternate, simple, 4–15 cm long and 5–9 cm broad, oblong-elliptic, densely hairy on the underside, and with a coarsely serrated margin and a 1–2 cm petiole. The flowers are white, 12–14 mm long, produced on panicles 10–15 cm long.The Pterostyrax psilophylla is mainly distributed in the lower and middle mixed forest of ever-green and deciduous trees in the subtropical mountains of China. Due to over-logging, the forest environment has deteriorated severely. In addition, the blossoming of the Pterostyrax psilophylla has a inactive period. As a result, it has a weak natural regeneration ability. As a result, the distribution area shrank and its number decreased. More