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Wisconsin Weeping Willow Arborvitae Salix vitellina britzensis Tsuga canadensis (in variety) Hybrid Yellow Willow Canadian Hemlock Sciadopitys verticillata Ulmus joliacea wheatleyi Umbrella Pine Wheatley's Cornish Elm Ulmus glabra camperdowniCamperdown Weeping Elm b. Columnar and pyramidal trees: Oftentimes situations arise in the solution of landscape problemswhere the use of trees for their pyramidal or columnar habit of growthbecomes almost a necessity. This necessity may arise because of suchfeatures being an important part of the landscape composition, or itmay arise because of the screen effect which the designer is desirousof producing where trees must develop within a narrow space of fromtwo to four feet. Most of the trees in this group develop normally intoa pyramidal or columnar form like the pyramidal maples, the poplars,and the red cedar, quite unlike the spreading habit of the sugar maples,horse-chestnut, and beech. None of these trees lend themselves to usein plantations where a broad, informal character is desired in thepicture; but all lend themselves for use in landscape planting where it isnecessary to have a background of heavy foliage and an immediategarden planting close to these trees. The planter should alwaysbear in mind that a background of trees of this type, planted closelytogether, will be very injurious to a flower garden development,provided the screen planting is located on the southerly side of theflower garden, thus throwing dense shade over the garden during thegreater part of the day. From another point of view, however, thistype of tree planted closely together will prove a wonderful asset ifplanted on the southerly side of some fountain or garden terminus where it is desired to produce a heavy shade. |
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