205 2 6 207 



FIGS. 205-213. FORMS .OF UNDERGROUND STEMS. 

 205, tubers of potato ; 206, thick rhizome of Iris ; 207, upright rhizome of violet ; 



208, running rhizome of goldenrod ; 209, corm of Trillium ; 210, longitudinal sec- 

 tion of a corm or solid bulb ; 



211, runner or stolon of strawberry; 212, scaly bulb of tiger lily; 213, tunicated 

 bulb of onion. 



214 



215 216 217 



FIGS. 214-218. FORMS OF ROOTS. 



218 



214, fibrous roots; 215, conical root; 216, napiform root; 217, tuberous roots, the 



individual roots fusiform ; 218, nbro-tuberous roots. 



392 



