52 PLATANACEAE 



4-lobed above the adherent calyx-rim. 



1. Leaves somewhat glaucous beneath, glabrate. F. major. 

 Leaves merely paler green beneath. 2. 



2. Leaves large (50 mm.), glabrate. F. monticola. 

 Leaves rather small (scarcely 25 mm.). 3. 



3. Leaves sparingly stellate-hairy above, obovate. F. Gardeni. 

 Leaves downy above, ovate-cordate. F. parvifolia 



LIQUIDAMBAR. Sweet Gum. 



Deciduous rather large resinous trees with rather hard 

 light brown wood with very numerous minute diffused ducts 

 and crowded fine medullary rays; rather stout rounded often 

 corky ridged twigs; angled homogeneous pale pith; alternate 

 half-round low leaf-scars with 3 bundle-traces; obscure stipule- 

 scars; ovoid solitary glossy buds with half-a-dozen exposed 

 scales, frequently becoming stalked or developing the first sea- 

 son; rather large simple palmately nerved and lobed long- 

 stalked leaves frequently clustered on spurs; inconspicuous 

 monoecious apetalous flowers, the staminate in racemed head- 

 like clusters, and the pistillate in a long-stalked head becom- 

 ing a bur-like aggregate of inferior dry beaked capsules. 

 Leaves with hairy tufts beneath. L. Styraciflua. 



Leaves without hairy tufts. L. orientalis. 



Family PLATANACEAE. Sycamore Family. 

 A small family comprising a single genus of rather few 

 species, the common button-ball furnishing the characteristic 

 wood used for very cheap cigar-boxes: much planted as street 

 trees, the oriental plane frequently pollarded into an umbrella 

 form in Europe. 



PLATANUS. Sycamore. Buttonball. 



Deciduous trees with exfoliating bark while young; light 

 brown rather firm wood with minute diffused ducts and close 

 and rather thick medullary rays; moderate usually elongated 

 roundish twigs; roundish continuous browning pith; some- 

 what raised 2-ranked nearly annular crenulate leaf-scars en- 



