552 



A TEXTBOOK OF BOTANY 



[On. XIII 



(Fig. 397), which form a fringe to the growing land in tropica 

 salt waters, belong also to this order. 



ORDER 21+. UMBELLALES: THE UMBELLIFERS AND KIN. 

 Some 2000 species, mostly herbs, distinguished in general 



by the special- 

 ized inferior ova- 

 ries of the many 

 small flowers. 

 To the Araliacece 

 belong the Gin- 

 seng, a medicinal 

 plant, the Eng- 

 lish Ivy, and 

 some spiny gar- 

 den shrubs (Ara- 

 lia) . In the 

 Umbelliferce, or 

 Parsley Family, 

 with their char- 

 acteristic simple 

 or compound 

 umbels of small 

 flowers (Fig. 

 398), are some 

 food plants 

 (Carrot), and 

 many which are 

 medicinal and 



poisonous, in- 



, i?!'7"- A thi ? ket of , - 



mangle) bordering salt water. . tV i 



The characteristic aerial roots are prominent ; and chiding the clas- 



on the branches are the "viviparous" embryos, i.e. S i C Poison Hem- 



they put forth their long hypocotyls while still in * , ' f ,. tf 



the fruits. (From Kerner.) lOGK^ for which 



our Hemlock 



tree was named on account of a fancied resemblance in 

 the foliage. Here belong also the Dogwoods (CornacecE) 



