ULMACEAE. 69 



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 climbing 

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

 rather stout terete twigs ; round continuous pith diaphragmed 

 at the nodes ; alternate somewhat raised rather large rounded 

 leaf-scars with 3 compound bundle-traces ; narrow stipule-scars 

 encircling the twigs; rounded subsessile solitary buds, with half- 

 a-dozen or so scales when fertile, the vegetative buds pointed 

 and with I scale ; simple mostly long-stalked leaves ; minute 

 imperfect apetalous flowers concealed in the large hollow recep- 

 tacle; 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 deliquescent trees with pale or usually 

 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-petioled oblique 

 toothed moderate leaves ; small perfect apetalous clustered 

 flowers appearing before the foliage ; and round samaras. 



1. Leaves once-serrate, small (scarcely 5 cm. -long). 2. 

 Leaves doubly serrate. 3. 



2. Not weeping. U. pumila. 

 Weeping. U. pumila pendula. 



