ISO 



ORGANOGRAPHY. 



Fiq. 361. 



Fig. 3fil. A portion of a branch 

 of the Gooseberry f^Ribes Gros- 

 sularia). /. /• Scars of leaves, 

 with buds in their axils, c. 

 Spines produced from the pul- 

 vinus. 



characters alluded to when speak- 

 ing of the spines of branches. 

 2nd, The petiole may assume a 

 spiny character, either at its 

 apex, as in Astragalus Traga- 

 cantha and massiliensis ; or at its 

 base by the pulvinus {jig. 361), 

 as in Ribes Grossularia. 3rd, The 

 stipules may become transformed 

 into spines, as in the False 

 Acacia (liobinia pseudo-acacia), 

 {Jig. 256). 



Tendrils of Leaves.— Any part 

 of the leaf may also become cir- 

 rhose or transformed into a tendril. 

 Thus, — 1st, The midrib of the 

 blade of a simple leaf may project 

 beyond the apex, and form a 

 tendril, as in Gloriosa superba, and 

 Albuca cirrhata ; or in other cases 

 some of the leaflets of a compound 



Fig 362. 



Fig. 364. 



Fig. 363. 



Fig. 'M2. I^eiff of Lnthi/rm, showing a winged petiole, with two half- 



gagittatc stipules at its base, and terminated by a tendril. Fig. 3fi3. A 



portion of tiie stem of Latlii/nia A})hiica, with stipules .i, and cirrhose 



tendril w Fig.'.'M. A portion of the stem of •S'nit7<(x, bearing a petio- 



lar leaf, and two tendrils in place of stipules. 



