BOTANY FOR BEGINNERS 



CHAP. 



Description of a typical Crucifer. Cheiranthus 

 Cheiri. (Wallflower). 



Habit. A perennial plant which grows on old walls, and is 

 largely cultivated in gardens. 



Root. A much branched, woody tap-root. 



FIG. 242. Wallflower (Cheiranthus). A, Branch and inflorescence ; B, flower ; 

 C, longitudinal section of flower ; D. stamens and pistil : E, fruit ; S, transverse 

 section of stem. (One-fourth nat. size.) 



Stem. Woody below and herbaceous above, erect, branched, 

 ribbed ; the lower part is covered with pale brown bark, and 

 the upper portion is coloured green and is hairy. 



Leaves. Cauline, alternate, sessile, lanceolate, acute, entire 

 and reticulate-veined. Upper side dark green and slightly 

 hairy ; the lower side pale green and more hairy ; exstipulate. 



