276 



CONSERVATIVE ORGANS. [LECT. VI. 



Alexanders, Smyrnium olustratum : /3. Stri- 

 ated (striatus), when it is longitudinally in- 

 dented with fine parallel lines * ; as in Sorrel, 

 Rutnex acetosa. 



d. Knotted (nodosus), (fig. w, 1), implying that 



the stem is divided, at 

 intervals, by swellings or 

 knots ; as in Knotty 

 Cranes'-bill, Geranium 

 nodosmn, &c. 



e. Articulated (articu- 

 latus), that is, composed 

 of joints, or apparently 

 distinct pieces, united at 

 their ends-j~. It is re- 

 markable that Linnaeus, 

 in his definition of this 

 form of stem, should have confounded it with 

 the kneed stem, as he must have been well 

 aware that many articulated stems are per- 

 fectly straight or erect. In some instances the 

 articulated stems are knotted at the joints, 

 but in others they are plain. Many of the 

 Grasses afford instances of the former ; while 

 the Cactus tribe sufficiently exemplify the latter. 

 f. Kneed (geniculatus), (fig. w, 2), when an ar- 



* " Striatus lineis tenuissimis excavatis inscriptus." Phil. 

 Bot. 82. 17. 



f " Articulatus, internodiis geniculatus : Piper." Phil. 

 Bot. 82.31. 



