Vegetatively propagated plants of this cultivar are considered to have better resistance to bronze birch borer than seed propagated plants, resulting in the use of the cultivar name 'Whitespire Senior' by some nurseries as a way of designating those plants which have been vegetatively propagated. For information about how you could sponsor this page, see How You Can Help, Article from Bean's Trees and Shrubs Hardy in the British Isles. Recommended citation'Betula populifolia' from the website Trees and Shrubs Online (treesandshrubsonline.org/articles/betula/betula-populifolia/). Smooth, non-peeling, chalky white bark even through maturity someitmes with a tinge of pink marked with black triangles. NC State University and N.C. A&T State University work in tandem, along with federal, state and local governments, to Yellow-brown male catkins appear in fall, remaining on tree through winter and opening in spring. They often appear in pairs, but these pairs are really borne on spur-like, two-leaved, lateral branchlets. The leaves are 5-7.5 cm long by 4–6 cm wide, alternately arranged, ovate, and tapering to an elongated tip. neoalaskana of the Northwest, and several Asian taxa. Although this gray birch has some susceptibility to aphids, birch skeletonizer and dieback, these problems are usually considered to be somewhat minor in comparison to the birch borer and birch leaf miner. : Betula occidentalis - The leaves are smaller than other Beech species, only 1-2 inches long and almost as wide, giving the leaf a rounded triangular shape. Full sun (6 or more hours of direct sunlight a day), Partial Shade (Direct sunlight only part of the day, 2-6 hours). During periods of drought when organic soils can become extremely dry, a hot, slow-moving ground fire can burn all the organic matter and consume the shallow roots, thus killing the tree [ 4 , 31 ]. Native of eastern N. America; introduced in 1750. It needs little pruning, but if necessary, you can prune during the dormant season. A genus of 35-100 species of trees, shrubs, and subshrubs; of subarctic and temperate regions of the Northern Hemisphere. Drooping cone-like fruits contain numerous small winged seeds that typically mature in late summer. Betula populifolia (Grey birch) will reach a height of 10m and a spread of 3m after 20-50 years.. diameter; scales downy, with the side lobes broader and more rounded than the middle one. It is now assigned to Betula populifolia and the plants are often sold under the name 'Whitespire Senior' to avoid confusion. Betula populifolia, commonly called gray birch, is a short-lived, narrow-columnar, suckering, deciduous tree that typically grows to 20-40 tall. (2019) p 191-92 Parts Shown: Leaf, Habit Photo Dirr, Michael A. Dirr's Hardy Trees and Shrubs. It is short-lived, but according to Sargent performs a valuable function in acting as a nurse for the seedlings of more durable trees. Betula L. (Betulaceae). The cultivar, 'Whitespire', is best known for its upright form, non-exfoliating white bark, dark green leaves and attractive yellow fall color. It is not recommended for planting south of USDA Zone 7. Fire Effects Information System (FEIS) Article for Betula populifolia ... Leaves are doubly-serrate, with larger points where the veins meet the leaf margin, and smaller serrations in between these points. Betula populifolia is an important successional tree on burned, cleared, or abandoned land in the Northeast. Tiny monoecious flowers appear in early spring in separate catkins on the same tree: yellowish-brown male flowers in single catkins (to 4” long) at the branch tips and greenish female flowers in smaller, upright catkins (to 1/2” long). Japanese Gray Birch grows best in medium to wet, well-drained, sandy or rocky loams in full sun to part shade. Ovate nuts, 1.2-2.2 mm long, puberulous, wings 1.5-2 times wider, ripen fall-spring. The species, Betula populifolia, or gray birch, is a short-lived, narrow-columnar, suckering, deciduous tree that typically grows to 20-40’ tall. Betula is Latin for birch and describes a genus of about 60 species of deciduous trees and shrubs found in many gardens and landscapes throughout the northern hemisphere. Betula populifolia is a very common species in the northeastern portion of its geographic range. Birch species are generally small to medium-sized trees or shrubs, mostly of northern temperate and boreal climates. form a strategic partnership called N.C. Shaded area represents potential planting range. Betula populifolia 'Royal Frost' An excellent specimen tree with dark purple, glossy, pendulous foliage providing soft filtered shade in the landscape. The name 'Whitespire' was incorrectly assigned to Betula platyphylla. But if necessary, you can prune during the dormant season borers it... 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