12 ASCENDING PART. HERBAGE. 



and intrafoliaceous (withinside of the leaf), as in 

 Grasses, fig. 141, and Polygonum, as well as the 

 tribe called Rubiacece, fig. 198, 199. In some 

 of the latter they are divided, or compound. 

 Some Stipulas are soon deciduous, others per- 

 manent as long as the Leaves. This organ is 

 by no means universal, even in the same genus, 

 as Cistus ; nor constant in the same species, as 

 Saliv. 



2. Br actea, the Floral Leaf, a leafy appendage to 

 the Flower, or its Stalk (17, 19), is often co- 

 loured ; either deciduous, or as permanent as 

 the Flower-stalk, to which it is sometimes firmly 

 attached, fig. 235. 



3. Spina, a Thorn, originates in the wood itself, 

 and by culture in rich soil, disappears, becoming 

 a branch. Footstalks (23) sometimes harden 

 into spines ; as do Stipulas (47 : 1) in Xanthium; 

 and Flower-stalks (19) in Pisonia. 



4. AculeuSj a Prickle, arises from the bark only, 

 as in Roses, and does not disappear by culture. 



5. Cirrus, a Tendril, a true fulcrum or support, is 

 either axillary, or terminates a Leaf (42) or a 

 Footstalk (23) or even a Flower-stalk (19), serv- 

 ing to sustain weak stems upon others. Tendrils, 

 at first straight, soon turn spirally, and in some 

 instances turn again, in the contrary direction. 

 They are simple or branched ; their extremities 

 often dilated and adhesive. The fibrous sup- 



