'98 



FOEMS OF STIPULES. 



stipules on either side unite wholly or partially, so as to form an inter- 

 petiolary or interfoliar (inter, between) stipule (fig. 206 s), as in Cia- 

 chona and in Ipecacuan. In the case of alternate leaves, the stipules 

 at the base of each leaf are sometimes united to the petiole and to 

 each other, so as to form an adnate, adherent, or petiolary stipule, as 

 in the Eose (fig, 207 s), or an axillary stipule, as in Houttuynia 



Fig. 208. 



Hg. 209. 



cordata (fig. 208 s). In other instances the stipules unite together 

 on the side of the stem opposite the leaf, and become synochreate (nvv, 

 together), as in Astragalus (fig. 209 s). The union or adhesion of. 



Fig. 206. Branch, r, and two leaves, //, of CepKalanthus occidentalis. s, Interpetiolary 

 or interfoliar stipule, formed by the partial union of two. Fig. 207. Portion of a branch, 

 T, of Eosa canina, or dog-rose, bearing a single. leaf, f, with its petiole, p, its petiolary or 

 adnate stipules, s, its axillary bud, b, and its aculei or pricliles, a. Fig. 208. Portion of 

 a branch, r, of Houttuynia cordata, with a leaf, /, and an axillary stipule, s, formed by the 

 union of two. Fig. 209. Branch, r, and portion of the leaf, /, of Astragalus Onobrychis, 

 with a synochreate stipule, s, formed by the union of two stipules on the opposite side of 

 the branch from that to which the leaf is attached. The leaf is pinnate, and in the figure 

 three pairs of leaflets or pinnae are left. 



