. Annual report of the Agricultural Experiment Station. Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). 2l8 Bulletin In cultivation in this country it is represented by no less than three well marked botanical varieties, differing from the species and from each other in the habit of growth, shape and color of leaves and character of twigs. P. balsamifera variety intermedia (Loudon, Encyc. of Trees and Shrubs, 830 (1842). P. latirifolia of American horticulturists, not of botanists. P. Sibirica pyramidalis, of horticulturists). Fig. 4. A com- parativel
. Annual report of the Agricultural Experiment Station. Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). 2l8 Bulletin In cultivation in this country it is represented by no less than three well marked botanical varieties, differing from the species and from each other in the habit of growth, shape and color of leaves and character of twigs. P. balsamifera variety intermedia (Loudon, Encyc. of Trees and Shrubs, 830 (1842). P. latirifolia of American horticulturists, not of botanists. P. Sibirica pyramidalis, of horticulturists). Fig. 4. A com- paratively slow growing tree of close upright habit, from Northern Eur- ope, where it is used as a street tree. The leaves are very thick and hard, finely ^ «aA serrate, oval in outline, and prominently whitened beneath, and they are commonl}- rather small for this group. Twigs hard and cylindrical. It is considered to be a valuable tree for hot and dry interior climates; and it also has distinct merit for ornamental planting. It eventually becomes a large tree. The Populus laurifolia and P. Sibirica Pyramidalis of American nurserymen are, so far as I can determine, only minor variations of one varietal type. All these trees are amongst the recent introductions of Russian poplars. P. balsamifera ,(Eoudon, Encyc. 830, t. 1510. P. viminalis, Eodd. Cat. (1836). P. Li7idleyana, Booth, Rev. Hort. 1867, 380. P. salicifolia, P. crispa, P. Dudleyi, and P. pyramidalis suaveolens of horticulturists. Also sometimes called P. laurifolia'). Fig. 5. A tree of only moderate and rather slen- der growth, with a partial weeping habit when old ; native to northern Europe. It is at once distinguished from other forms of Populus balsamifera by its sharply angled twigs (k, fig. i), and broad-lanceolate willow-like leaves which are finel}^ serrate and often crinkled-margined. Populus balsamifera variety intermedia. Please note that these images are extracted from scanned page images
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