32 ULMACEAJB 



3. Leaves rather exceptionally lobed. (White mulberry). M. alba. 

 Leaves mostly lobed. 4. 



4. Leaves cuneate, toothed, white-veined. M. alba nervosa. 

 Leaves rather regularly lobed. 5. 



5. Not weeping. (Tartarian mulberry). M. alba tatarica. 

 Weeping. (Teas' mulberry). M. alba pendula. 



Ficus. Fig. 



Deciduous shrubs or trees (of large size and unusual habit 

 in the tropics, or with persistent leaves and sometimes climb- 

 ing by roots as in forms cultivated under glass), with milky 

 sap; rather stout terete twigs; round continuous pith dia- 

 phragmed at the nodes; alternate somewhat raised rather large 

 rounded leaf-scars 1 with 3 compound bundle-traces; narrow 

 stipule-scars encircling the twigs; rounded subsessile solitary 

 buds, with half-a-dozen or &o scales when fertile, the vegetative 

 buds pointed, and with 1 scale; simple mostly long-stalked 

 leaves; minute imperfect apetalous flowers concealed in the 

 large hollow receptacle; and fleshy hypanthium containing 

 numerous small seed-like akenes. 

 Leaves palmately nerved, often deeply lobed. F. Carica. 



Family ULMACEAE. Elm Family. 



A rather small family of little economic value except that 

 some of the elms furnish the finest of shade- and street-trees, 

 and lumber is obtained from elms and hackberry. 



ULMUS. Elm. 



Deciduous often very delique&cent trees with pale or usual- 

 ly brown tough wood with small ducts usually larger and more 

 crowded in spring but minute and in tangential patterns in 

 autumn, and fine medullary rays; slender terete or winged 

 twigs; small rounded continuous pith; alternate 2-ranked 

 half-round or half-elliptical somewhat raised leaf-scars with 3 

 bundle-traces; transverse stipule scars; sessile ovoid buds with 

 a number of 2-ranked scales, the terminal absent; short-petiol- 

 ed oblique toothed moderate leaves; small perfect apetalous 



