REPORT OF THE HORTICULTURIST 131 



SESSIONAL PAPER No. 16 



2. Acer platanoides. — Norway maple (Europe). Height 30 to 50 feet. The Nor- 

 way maple is one of the hardiest of ornamental trees. The dark green leaves appear 

 before those of our native hard maple and fall from two to three weeks later in the 

 autumn, but do not assume such a brilliant colour, the leaves having different shades 

 of yellow. When in flower this tree is also quite attractive. 



3. Acer platanoides Schwedleri. — Schwedler's Norway maple. One of the best 

 ornamental trees. The leaves are large, and in the early part of the summer are of a 

 bright, purplish red, becoming duller as the season advances, and finally losing the 

 purplish tinge. The variety Reitenbachii, while not having so attractive foliage, re- 

 tains the purplish tinge throughout the summer. 



4. Acer saccharinum. — Hard, or sugar maple (Canada). Height 50 to 70 feet. 

 The hard maple needs no description. Its clean, clear cut, green leaves, almost free 

 from insect pests, handsome form, delicately and highly tinted leaves in autumn, 

 recommend it as one of the best of hardy trees. 



5. Acer tataricum Gi7inala. — Ginnalian maple (Amurland). Height 10 to 20 feet. 

 The deeply cut, pretty leaves of this little maple make it ornamental throughout the 

 summer, and in the autumn it rivals all other maples in the variety and brilliancy of 

 its colouring. 



6. Aesculus Hippocastanum. — Horse chestnut (Mountains of southeastern Europe). 

 The horse chestnut is well known. At Ottawa all specimens have not proven hardy, 

 but if procured from northern grown stock they should do well. This tree is very 

 ornamental when in full leaf and flower. 



7. Alnus glutinosa imperialis. — Imperial cut-leaved alder (Europe). Height 20 to 

 30 feet. The cut-leaved alder is a very distinct and graceful tree with deeply cut fern- 

 like leaves and pendulous branches. 



8. Betula alba laciniata pendula. — European cut-leaved birch (Europe). Height 

 30 to 50 feet. One of the most graceful and hardy of all ornamental trees. The 

 pendulous branches, finely cut foliage and elegant form of this birch make it very 

 desirable. After it has been twenty years planted at Ottawa the top begins to die 

 back and the trees become unshapely During recent years it has been affected with 

 borers. 



9. Catalpa Kaempferi. — Japanese catalpa (Oapan). Height 30 feet. In bloom 

 second week of July. Flowers yellow spotted with purple, and smaller than those of 

 the hardy catalpa. The leaves are purple veined. This is the hardiest catalpa grown 

 here. 



10. Catalpa speciosa. — Hardy catalpa (United States). Height 30 to 40 feet. 

 In bloom fourth week of June. Flowers large, white, spotted with purple and yellow. 

 This tree is very handsome when the flowers are in bloom. The leaves are large and 

 heart-shaped. The seed pods which form during the latter part of the summer become 

 more than one foot in length. The whole tree is very tropical looking. To ensure 

 hardiness, trees should be obtained from northern grown stock, as but few specimens 

 have proved hardy at Ottawa. Tea's hybrid catalpa, while not quite so handsome is 

 about as hardy or hardier. 



11. Cercidiphyllum japonicum. — Katsura tree (Japan). Height 30 to 50 feet. 

 The pyramidal shape and delicate heart-shaped leaves of this tree make it very attrac- 

 tive and ornamental. It is closely related to the magnolia family but is quite hardy 

 at Ottawa. 



12. Crataegus Crus-gaUi. — Cockspur thorn (Ontario). Height 15 to 25 feet. In 

 bloom second week of June. Flowers white, tinged with pink. The leaves of this tree 

 are very ornamental, being thick, smooth and very shiny. 



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