87 



Dwarf Alder, 



Decidlibtis shrubs with father slender rcmilded Somewhat 

 zig-gag twigs ; omewhat angular homogeneous pale pith ; alter- 

 nate 2-r'ariked little'-raiseM half-r'ound leaf-scars With I bundle- 

 trace; triangular stipule-scars ; dvQid esilg blids with a pair of 

 stipular" scales ; rathgr large f ouiidish stalked leaves siibpalm- 

 atety nerved, and toothed above 1 the middle; Snlall perfect pale 

 floWers iii terminal spikes ; and globose small hard fruits, 4- 

 Idbed above the adherent calyx-r'im. 

 t; 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. Garden!. 



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 season ; 

 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 becoming a bur-like ag- 

 gregate 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 F.urope. 



