SECT. II 



PHANEROGAMIA 



555 



Uhinis campestris (Fig. 531), tlie Elm, is a couimon European tree. The 

 arrangement of tlie leaves on the sides of the twigs in two rows and the corre- 

 sponding branching leads to the leaf-surface exposed on each lateral branch making 

 a definite angle with the main branch and composing the regular convex crown of 

 foliage exhibited by older examples. The tree flowers in February and the fruits 



Fic. 531. — Uimua cnmjirstris Q nat. size). 1, Branch with flower.s. ~', Branch with fruits. 



3, Single flower, enlarged. 



ripen before the leaves expand. The fruits are broadly winged and adapted to be 

 carried by the wind. U. montMna, f^. c//ms« are closely related forms. Several species 

 of Cclfiti, in which the fruit is a drupe, are in cultivation. 



Family 2. Moraeeae (^^). — The majority are trees or shrubs with 

 abundant latex. Leaves alternate, stipules caducous. Flowers uni- 

 sexual in globular or disc-snaped inflorescences ; mostly tetramerous, 

 Stamens opposite the leaves of the perigone. Ovary bicarpellary. 



