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Betula populifolia, known as the gray (or grey) birch, is a deciduous tree in the family Betulaceae. It is native to eastern North America and is most commonly found in the northeast United States as well as southern Quebec , New Brunswick , and Nova Scotia . [ 1 ]
Aethalura punctulata, the grey birch, is a moth of the family Geometridae. The species is found in Europe and then east, as far as western Siberia and the Caucasus.This species prefers sparse alder-ash-floodplain forests on moist to wet locations. Although it is only locally distributed in Central Europe, it is usually common in these biotopes.
Betula alleghaniensis, the yellow birch, [2] golden birch, [3] or swamp birch, [4] is a large tree and an important lumber species of birch native to northeastern North America. Its vernacular names refer to the golden color of the tree's bark. [5] In the past its scientific name was Betula lutea, the yellow birch.
Birch plywood is made from laminations of birch veneer. It is light but strong, and has many other good properties. It is among the strongest and dimensionally most stable plywoods, although it is unsuitable for exterior use. Birch plywood is used to make longboards , giving it a strong yet flexible ride
Betula platyphylla (Betula pendula var. platyphylla) - Siberian silver birch; Betula populifolia - Gray birch; Betula szechuanica (Betula pendula var. szechuanica) - Sichuan birch; Tetraploid (4n = 56). Betula celtiberica - Iberian white birch; Betula pubescens - White birch, European white birch or downy birch Betula pubescens subsp. tortuosa ...
The Betulaceae are believed to have originated at the end of the Cretaceous period (about 70 million years ago) in central China.This region at the time would have had a Mediterranean climate due to the proximity of the Tethys Sea, which covered parts of present-day Tibet and Xinjiang into the early Tertiary period.
The twigs are yellow-brown to dark-brown and are dotted with resin glands and gray lenticels. [2] They lack the hairs found on Betula papyrifera. [4] The flowers are catkins, with pollen catkins 2–4 cm long and seed catkins 1–2 cm long. The seed catkins mature to about 3–5 cm long and bear winged nutlets about 2–3 mm long. [3]
Betula pubescens is known as downy birch, with other common names including moor birch, white birch, European white birch or hairy birch. [3] It is a deciduous tree growing to 10 to 20 m (33 to 66 ft) tall (rarely to 27 m), with a slender crown and a trunk up to 70 cm (28 in) (exceptionally 1 m) in diameter, with smooth but dull grey-white bark ...