APETALOUS EXOGENOUS PLANTS. 495 



gins slightly ciliate; stijmles small, linear, membranaceous, 

 caducous; fruit ripe last of May, black and sour, with 

 little juice and deep sinuses between the achenia, which are 

 a little compressed; sti/Ies divaricate and obtuse; leaves 

 generally entire, 1-lJ inches, and of about the same width ; 

 the lobed leaves are about 2 J inches long, the middle lobe 

 prolonged and acuminate. Stem and hranclies smootli, 

 with ia light-gray bark. — A large slirul) or small tree, 12-20 

 feet high, growing in clumps. Western Texas, on hills in 

 vicinity of Austin. 



FICUS, Tourn. Fig. 



Floiuers monoecious or dioecious, lining the inside of the 

 fleshy closed receptacle ; calyx of the sterile flowers 3-part- 

 ed; stamens 3 ; calyx of the fertile flowers 5-cleft, pediceled; 

 styles lateral, slender; aclienium fragile ; embryo hooked. — 

 Trees or shrubs, with entire or lobed leaves, and large con- 

 volute stipules ; floioers axillary. 



Broussonetia papykifera. Vent., the Paper Mulberry 

 of our yards, belongs to this family. 



117. ELM FAMILY. Order, Ulmace^. 



Trees, with watery juice, alternate undivided stipulate 

 leaves, and perfect or polygamous apetalous/ozt'srs; calyx 

 4-9-lobed ; stamens 4-9, inserted on the base of the calyx, 

 erect in the bud; ovary 1-2-celled; ovules solitary, sus- 

 pended; styles 2, spreading; fruit membranaceous or dru- 

 paceous; embryo straight or curved, without albumen; 

 cotyledons leafy. 



SYNOPSIS. 



* Fruit dry ; anthers extrorse. 



Floioers perfect. Ovary 2-celled. Fruit winged Ulmtts. 



polygamous. Ovary l-celled. Fruit wingless Plankra. 



** Fruit a drupe ; anthers introj-se. r 

 Floioers polygamous. Ovai^j \-celled. Cotyledons curved Cei-tis. 



