OF THE FULCRA. 219 



It is commonly situated at the base of the 

 latter, in pairs, and is extremely diflerent 

 in shape in ditlerent plants. 



The most natural and usual situation ot 

 the Stipnlas is in poirs, one stipuia on each 

 side ot the base of the footstalk, as^ in 

 Lathy }'us laiifoUus, Engl. Bot. t. 1108, 

 \v hose stipnlas are halfarrov.-.shaped. /. 1 i5; 

 also in Willows, as Salix stipiilaris, 1. 1214, 

 and S. aur'da^ t. 148?. In I?o.su', Potcii- 

 tilla, and many genera allied to them, the 

 stipulas arc united laterally to the footstall:, 

 f. 116'. See PotentUla alba, f. 1384. In 

 all these cases they are extrafoUacea:, ex- 

 ternal with respect to the leaf or footstalk; 

 in others they are intrafoliacecc, internal, 

 and are then generally simple, as those of 

 Folijgonwn, f. 1382, 7.06, &c. In a 

 large natural order, called Rubiacca', these 

 internal stipulas in some cases embrace the 

 stem in an undivided tube above the inser- 

 lion of the footstalks, like thse of Foh/- 

 gonum just mentioned ; in ethers, as the 

 Coffee, Coffea arabica, and the Hatnellia 

 patens, Estot. Bot. t, 24, tliey arc separate 

 kaves between tlie footst-dks, bat meeting; 



