STEM. 63 



Straight, as in the ditlerent species of the Lily. 

 Diffuse, or loosely spreading, as Sea Rocket, 



(Cakile.) 

 Zigzag or flexuose, forming angles alternately 



from right to left, and from left to right, as 



Cardamine flexuosa. 



Stems are either 



Cylindrical, as in TroUius. 



Two-edged, as in Lathyrus. 



Triangular, as in some Rushes. 



Square, as in Dead-nettle. 



Angular, with five or more angles. 



Winged, the angles extended into flat leafy 



borders, as the Everlasting-pea, (Lathyrus 



latifolius.) 



The surface of the stem is either 



Smooth, (glabrous.) 



Viscid. 



Warty. 



Rough, with rigid irregularities, (scabrous.) 



Bristl}', (hispid.) 



Hairy, (pilose.) 



Downy, (tomentose.) 



Shaggy, (villose.) 



Woolly. 



