Quercus acutissima aka Sawtooth Oak

Quercus acutissima, also known as the Sawtooth Oak, is an Asian species of oak native to China (including Tibet), Korea, Japan, Indochina (Vietnam, Thailand, Myanmar, Cambodia) and the Himalayas (Nepal, Bhutan, northeastern India). It is part of Quercus sect. Cerris, a section of the genus characterised by shoot buds surrounded by soft bristles, bristle-tipped leaf lobes and acorns that mature in about 18 months. It has been widely planted in many lands and has become naturalized in parts of North America, although it has become a problematic invasive species in some areas, such as Louisiana. Sawtooth Oak is a medium-sized deciduous tree, growing to 25–30 metres (82–98 ft) tall with a trunk up to 1.5 metres (4 ft 11 in) in diameter. Its bark is dark gray and deeply furrowed and its leaves are 8–20 centimetres (3.1–7.9 in) long and 3–6 centimetres (1.2–2.4 in) wide, with 14-20 small saw-tooth like triangular lobes on each side. The flowers are wind-pollinated catkins and the fruit is an acorn, maturing about 18 months after pollination, 2–3 centimetres (0.79–1.18 in) long and 2 cm broad. As an indoor houseplant, Sawtooth Oak is not challenging to grow. It needs regular watering and long-lasting, direct light and should be kept less than a foot from a window. It prefers soil that is well draining and should not need additional fertilizers. With proper care, it can make an excellent addition to any home. However, it is not safe to consume, so it should be kept away from children, cats, or dogs.