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The primary species affecting birch trees in North America are Profenusa thomsoni and Fenusa pumila. Areas inside the leaves are consumed by the larvae, affecting the leaves' ability to produce food. Yearly browning of birch leaves are noticed in mid July and August, but the leafminers have been feeding inside the leaf tissue since early spring.
The leaves are rounded, 6–20 millimetres (0.24–0.79 in) diameter, with a bluntly toothed margin. The leaves are a darker green on their upper surface. Leaf growth occurs after snow melt and become red in autumn. The wind-pollinated fruiting catkins are erect, 5–15 millimetres (0.20–0.59 in) long and 4–10 millimetres (0.16–0.39 in ...
Betula neoalaskana (syn. B. resinifera) or Alaska birch, also known as Alaska paper birch or resin birch, is a species of birch native to Alaska and northern Canada.Its range covers most of interior Alaska, and extends from the southern Brooks Range to the Chugach Range in Alaska, including the Turnagain Arm and northern half of the Kenai Peninsula, eastward from Norton Sound through the Yukon ...
The leaves of this species serve as food for some caterpillars and the solitary leaf-cutter bee Megachile rubi cuts pieces from the leaves to line the cells of its nest. [ 5 ] Deer do not tend to browse young B. lenta allowing trees to grow in areas with high deer populations, Betula alleghaniensis , a close relative of B. lenta, is, however ...
Pyrus betulifolia, known as the birchleaf pear in English and tang li in Chinese, [2] is a deciduous wild pear tree native to the leafy forests of northern and central China and Tibet. It can grow 10 meters high in optimal conditions. Formidable thorns (which are modified stems) protect its leaves from predation.
Cercocarpus betuloides is a shrub or small tree in the rose family. [2] Its common names include mountain mahogany and birch leaf mountain mahogany [2] [3] The common name "mahogany" comes from the hardness and color of the wood, although the genus is not a true mahogany.
The leaves of the silver birch tree are used in the festival of St George, held in Novosej and other villages in Albania. [24] Birch leaves in the coat of arms of Karjalohja. The birch is New Hampshire's state tree and the national tree of Finland and Russia. The yellow birch is the official tree of the province of Quebec (Canada).
Carpinus betulus, the European or common hornbeam, is a species of tree in the birch family Betulaceae, native to Western Asia and central, eastern, and southern Europe, including southern England. [1] It requires a warm climate for good growth, and occurs only at elevations up to 1,000 metres (3,281 ft).