442 



BOTANY 



e.g. Clove (Caryophyllum*), Eugenia, and others with edible fruit, Eucalyptus, 

 etc. The Melastomaceae are also largely tropical, but several species of Khexia 

 represent the family within the United States. 



The largest family of the Myrtiflorae within our territory is the Onagraceae, 

 especially well developed in the western part of the country. Among the 

 characteristic genera may be mentioned Epilobium, (Enothera, Zauschneria, 

 Godetia, Fuchsia, and Clarkia (Fig. 435, D). 



The Water-milfoil (Myriophyllum) represents the peculiar family Halorrhagi- 

 dacese. 



FIG. 437. A-E, Pastinaca saliva. F-H, Aralia racemosa. I, Cornus florida, a 

 single flower enlarged. J, C. slolonifer, ripe fruit. 



Order XIII. Umbelliflorae 



The last order of the Choripetalae is the Umbelliflorae, so called from the small 

 flowers being arranged in umbels. The flowers are usually inconspicuous, 

 usually with the parts in 4's or 5's. The flowers are always epigynous. 



There are three families : Araliacese, Umbelliferse, and Cornaceae. The 

 Araliacese (Fig. 437, F) are represented by species of Aralia (Spikenard, Ginseng, 

 etc.) and the Ivy (Hedera). 



Umbelliferae. The second family, Urnbelliferae, is an extremely natural one, 

 and especially developed in the temperate parts of the northern hemisphere. 

 The structure of the flowers (Fig. 437, B) is extremely uniform, and the com- 

 pound leaves, with sheathing bases, are almost equally characteristic. 



