DESCRIPTION OF TREES. 173 



REITENBACH MAPLE (Acer platanoides, var. Reiten- 

 bachii) and SCHWERDLER'S MAPLE (A. p., var. Schwerd- 

 lerii) have already been described under Lawn-trees. 



JAPAN PURPLE-LEAVED MAPLE (A* polymorphum, var. 

 atropurpureum and sanguineum). Fig. 75. These two 

 varieties are very much alike, bnt the first has somewhat 

 darker foliage with a deeper-lobed and rather narrower leaf 

 than the last. They grow nearly as large as the common 

 form of this species, i.e., 10 to 15 ft., and the foliage is the 

 most beautifully colored of all of the purple-leaved trees. 

 They require a deep warm soil, and perhaps a little shelter 

 from too much exposure, and are more hardy when grown 

 in the lawn than when grown in a rich border. 



PURPLE SYCAMORE MAPLE (A. pseudoplatanus, var. 

 atropurpurea). A heavy, broad-headed tree, with dark 

 bronze-green foliage, but not of the decided color possessed 

 by Schwerdler's or the Japanese species. 



TRICOLORED SYCAMORE MAPLE (A. p., var. tricolor). 

 Of the same form as the last, but with leaves beautifully 

 marked with white, green, and purple. Very interesting, 

 but not a conspicuous tree. 



PURPLE-LEAVED BIRCH (Betula alba, var. atropurpurea) . 

 A tree of good form and with conspicuous colored foliage 

 in spring, soon .changing to a bronze green. The contrast 

 of this dark foliage with the white bark of the branches 

 makes it a very desirable tree. It succeeds upon very thin 

 soil. 



PURPLE-LEAVED CATALPA (Catalpa bignonioides, var. 

 purpurea). Were this tree perfectly hardy in the northern 

 sections of the country it would be one of the most desirable 

 trees for the lawn. It, however, is not quite hardy while 

 young, and, as with the C. speciosa, it must be kept in the 



