394 LESSONS WITH PLANTS 



In respect to duration — 

 AnmMl, 



plur-annual ; 



pseud -annual. 

 Biennial, 



potentially biennial. 

 Perennial, 



only part of the plant perennial (herbs); 



entire plant perennial (woody plants) ; 



various differences in the span of life, the herbs, as a 

 rule, being shorter-lived. 



In respect to habit — 

 Stem horizontal, 



creeping or repent CFig. 386) ; 



prostrate or procumbent (Fig. 409) ; 



ascending, or rising obliquely upwards, generally from a 

 more or less prostrate base ; 



decumbent or bent over (Fig. 387). 

 Stem vertical, 



shrubby or frutieose ; 



tree-like or arborescent. 

 Boot tuberous, 



tap-rooted (Fig. 382) ; 



fascicle-rooted, as in dahlia. 

 Boot fibrous, 



spreading (Fig. 412) ; 



tap-rooted (Fig. 413). 



Suggestions. — There is no better subject than the vrinter aspects 

 of trees to train the pupil's powers of observation. Ask him to 

 look at the different kinds of oaks or maples, or to compare the 

 oaks with the maples, looking at the tree-tops against a winter sky. 

 He will soon begin to catch the differences in outlines and details, 

 and trees will mean more to him ever after. The two hickories in 

 Figs. 410, 411 show minor and unimportant differences as compared 

 with some other trees. Let the pupil put his own emotions into 

 the trees, noting which ones appeal to him as strong, rugged, weep- 



