ORDERS OF ANGIOSPERMS. 497 



The plane-tree family (Platanaceae) , with the plane-tree, or 

 buttonwood (Platanus occidentalis), eastern North America. 

 (Other species occur in western United States.) 



The rose family (Rosaceae), including roses, spiraeas, rasp- 

 berries, strawberries, the shrubby cinquefoil (Dasiphora fruti- 

 cosa), etc. 



The apple family (Pomaceae), including the apple, mountain- 

 ash, pear, June-berry (or shadbush, also service-berry), the haw- 

 thorns (Crataegus). 



The plum family (Drupaceae), including the cherries, plums, 

 peaches, etc. 



The pea family (Papilionaceae) , including the pea, bean, 

 clover, vetch, lupine, etc., a very large family. 



966. Order Geraniales. Herbs, shrubs, or trees. Nine 

 families in the eastern United States. Examples: 



The geranium family (Geraniaceae), with the cranesbill (Gera- 

 nium maculatum) and others. 



The wood-sorrel family (Oxalidaceae), with the wood-sorrel 

 (Oxalis acetosella) and others. 



The flax family (Linaceaa). Example, flax (Linum vul- 

 garis). 



The spurge family (Euphorbiaceae). Plants with a milky 

 juice, and curious, degenerate flowers. Examples: the castor- 

 oil plant (Ricinus), the spurges (many species of Euphorbia). 



967. Order Sapindales. Mostly trees or shrubs. Twelve 

 families in the eastern United States. Example : 



The sumac family ( Anacardiaceae) , containing the sumacs in 

 the genus Rhus. (Examples: the poison-ivy (R. radicans), a 

 climbing vine, in thickets and along fences, in eastern United 

 States. Sometimes trained over porches. The poison - oak 

 (R. toxicodendron), a low shrub. Poison-sumac or poison-alder 

 (R. vernix=R. venenata), sometimes called "thunderwood," 

 or dogwood, is a large shrub or small tree, very poisonous. The 

 smoke-tree (Cotinus cotinoides) belongs to the same family, and 

 is often planted as an ornamental tree. The maple family (Ace- 

 raceae), including the maples (Acer). 



