japonica , or Japanese White Birch, is a cultivar of Betula platyphylla with a pyramidal form, white bark that does not exfoliate, a central leader and thin, spreading, slightly pendant branches. It also tolerates poor soils. 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 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. Description: A wonderful birch tree selection with snowy white bark and good fall color; higher resistance to the dreaded bronze birch borer than most other white-barked birches make this a preferred variety for home landscape use. It is native primarily from Southeastern Canada to Virginia, with a scattering of plants extending westward to Illinois. 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. Featuring an elegant, pyramidal habit, it bears ovate, toothed, lime-green leaves, 3 in. It is native primarily from Southeastern Canada to Virginia, with a scattering of plants extending westward to Illinois. Ornamental Features. Specific epithet come from the Latin populus meaning poplar genus and folia meaning leaves like those of the poplar.Species name comes from Populus (poplar genus) and Latin folia (leaf) in reference to leaf appearance. Selected at the U of WI this handsome 30-40' x 20' tree offers chalk white bark glossy dark green fine textured foliage tolerant of high temps AND resistance to … Plants stressed by insects seem more susceptible to cankers. It thrives in cool northern summers, but does poorly in the heat and humidity of St. Louis. It typically occurs in both dry and wet soils. japonica when introduced into commerce in 1983, but that designation was subsequently changed when it was determined 'Whitespire' was in fact a gray birch. Betula platyphylla var. It needs little pruning, but if necessary, you can prune during the dormant season. The name 'Whitespire' was incorrectly assigned to Betula platyphylla . Betula platyphylla var. 'Whitespire' reportedly has some resistance to the borer. N.C. This tree reportedly has some resistance to the borer. Consider using soaker hoses and bark mulches to keep the root zones cool and moist. 'Whitespire' was originally named as a cultivar of Betula platyphylla var. It seems to tolerate drier soils in its native range. Whitespire was first considered a cultivar of the Japanese Asian White Birch (Betula platyphylla japonica). It also tolerates poor soils. 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. Whitespire Birch (Betula populifolia 'Whitespire') in Inver Grove Heights, Minnesota (MN) at Gertens. River birch (see Betula nigra) is a better selection for St. Louis. Deciduous tree, 30-40 ft (10-12 m) tall, upright habit, bark attractive, grayish-white with black markings, leaves glossy green, yellow in … 'Whitespire' Nursery Availability 1 - 10 of 10. The Garden wouldn't be the Garden without our Members, Donors and Volunteers. NC State University and N.C. A&T State University work in tandem, along with federal, state and local governments, to Whitespire Senior Birch has dark green foliage throughout the season. Ornamental Features. Yellow-brown male catkins appear in fall, remaining on tree through winter and opening in spring. Drooping cone-like fruits contain numerous small winged seeds that typically mature in late summer. Not recommended for the St. Louis climate. Other Names: Betula platyphylla. Fall color is usually undistinguished. 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. 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). However, it is susceptible to leaf miner. This tree is noted for (1) its non-peeling chalky white bark with dark chevron trunk patches appearing below each branch base and (2) its long-pointed triangular green leaves. Avoid pruning in spring when the sap is running. Female flowers are followed by drooping cone-like fruits containing numerous small winged seeds that typically mature in late summer. Shiny 1.5"- 3" long 2"-3" wide, alternate, simple leaves ovate to triangular-ovate, unequally serrate to doubly serrate.
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