ROOT. STEM. 61 



Annual, when they belong to such plants as are 

 produced and bear flowers and seeds within 

 the year. 



Biennial, when they belong to such plants as 

 produce leaves only the first year, and flowers 

 and seeds the next, and then perish. 



Perennial, flowering through many successive 

 years, to an indefinite period. 



The Stem, (Caulis) elevates the leaves and 

 fructification ; it is either 



Woody or herbaceous. 

 Branched or simple. 

 Leafy, fig. 1, pi. 26, or 

 Scaly, fig. 2. 



A Stem is said to be 



Dichotomous, or forked, when regularly and 

 repeatedly divided, as the Misseltoe, (Viscum) 

 fig. 3. 



Alternately branched, when its branches are 

 alternate. 



The branches are said to be 



Two ranked or distichous, when they are spread 

 in two opposite directions. 



