ACER 



151 



wild trees. The fruits are smooth ; keys about i in. long ; the wings J in. 

 wide. , 



Var. CONCOLOR, Pax. Leaves green on both sides. 



Var. LATIALATUM, Pax. Wings of fruit broad, i in. wide, and almost semi- 

 circular. 



A. OLIVERIANUM, Pax. OLIVER'S MAPLE. 



A deciduous tree, from 12 to 25 ft. high ; branchlets smooth and often 

 purplish. Leaves five-lobed, i\ to 4 ins. wide, scarcely so long, truncate or 

 slightly heart-shaped at the Base ; the lobes ovate, long-pointed, minutely, 

 regularly and sharply toothed ; smooth except for down along the veins and in 

 their axils. Flowers borne at the end of a slender-stalked corymb, 2 ins. long. 

 Fruit smooth ; keys I in. long ; wings f in. wide, spreading nearly horizontally. 



Native of Central China ; discovered by Henry, and introduced by Wilson 

 for Messrs Veitch in 1901, and now succeeding well in their Copmbe Wood 

 nursery. It is allied to the A. sinense described below, but differs in the 

 smaller more finely and evenly toothed leaves, and in the short corymbose 

 inflorescence. The flowers develop at the same time as the leaves. 



A. OPALUS, Miller. ITALIAN MAPLE. 



(Garden, 1872, p. 443 ; A. opulifolium, Villars.*) 



A tree 30 to 50 ft. high, of rounded habit, sometimes much smaller or even 

 bushy ; branchlets smooth. Leaves 2| to 4^ ins. wide, somewhat less in 

 length, shallowly five-lobed, heart-shaped at Ihe base, irregularly toothed ; 



ACER .OPALUS. 



dark green, glossy and smooth above, paler and more or less downy beneath, 

 especially along the chief veins and in their axils, occasionally quite smooth ; 

 lobes angular. Flowers yellow, appearing in March, numerously crowded 

 in short-stalked corymbs ; each flower on a slender, smooth, pendent stalk, 

 i to i^ ins. long. Fruit smooth ; keys I to i^ ins. long ; wings in. wide, 

 varying considerably in divergence. 



Native of S. and Central Europe ; introduced in 1752. It is one of the 



