About Acer tegmentosum Maxim.
Acer tegmentosum, commonly called the Manchurian striped maple, is a species of deciduous tree in the maple genus. It is native to the southern Russian Far East along the Amor and Ussuri rivers in Primorsky Krai, northeastern China's Heilongjiang, Jilin, and Liaoning provinces, and Korea. This species is cold hardy down to USDA hardiness zone 5a, where temperatures can reach −29 °C. When mature at over 20 years old, it grows to a height of 10 to 15 metres (33 to 49 ft) and spreads 8 metres (26 ft) wide. It has greenish-grey bark marked with bright white stripes. Its leaves are simple, growing up to 12 cm across, with a generally round shape and 3 shallow lobes; they sometimes have two extra small lobes near the base, and feature doubly toothed edges. The green leaves turn bright yellow before dropping in autumn. It produces hanging 7 to 10 cm long racemes of yellow-green flowers, which develop into 1.1 to 1.3 cm long winged samara fruits. When cultivated in the United Kingdom, it has received the Royal Horticultural Society's Award of Garden Merit. Known cultivars of this species include 'Joe Witt', 'Valley Phantom', and 'White Tigress'. While it is generally not a conservation concern overall, it was listed as vulnerable on the 2004 Chinese Species Red List.
