LESSON O.J 



riiii.r.oniA, stipulks, etc. 



dar, and Arbor- Vita^ (F'g- 135), are difTcrcnt pxamplos. Those 

 last are leaves serving lor lbliag(.', but having jis 

 little spread of surl'aee as jHJSsiWle. They insdce 

 up for this, however, by their inunense nunjbei*s. 



177, SoMietinies ihc pet iu/e expands and flattens, 

 and takes tlie j)laee of the blade ; as in innnenms 

 Nt'W Holland Aeacias, some of which an; now 

 common in greenhouses. Such counterfeit blades 

 are called phyllodia, — meaning leaf-like bodies. 

 Tiiey may be known from true blades by their 

 standing edgewise, their margins being directed 

 upwards and downwards ; while in true blades the 

 faces look upwards and downwards ; excepting in 

 equitant leaves, as al- 

 ready explained, and 

 in those which are 

 135 turned edgewise by 



a twist, such as those of the Callis- 



temon or IJottle-brush Flower of our 



greenhouses, and other Dry ]\I}rtlcs 



of New Holland, cVc. 



178. SlipnU'S, the pair of appendages 



Avhich is found at the base of the peti- 

 ole in many leaves (133), should also 



be considered in respect to their very 



varied forms and appearances. More 



commonly they appear like little blades, 



on each side of the leaf-stalk, as in the 



Quince (Fig. 83), ami more strikingly 



in the Hawthorn and in the Pea. Here 



they remain as long as the rest of the 



leaf, and serve for the same purpose 



as the bliule. Very commonly they 



serve for bud-scales, and fall of!" when 



the leaves expand, as in the Fig-tree, 



and the Magnolia (where they are large and conspicuous), or soon 



FIG. 135. Twip of Arhor-Vile, with itH two sorts of Ip.-ivcs : viz. oome awl-slin|><>il, tiM 

 olheM Hc.ilc-liko ; tlip Inner on the liraiirlilrfi, a. 



FIG. 13(i. Lcifof Red flovir : 't, 8li|mlos, acJIioring to tlip b.iso of /., tlio iwtiolo : fc. Mads 

 of thrre IcnflptH. 



FIG. 137. Partof Rtomnnd Ic-if ofrriiic«'B-F©«Uior i^PolyRoiuiiii oricntalo) with tlM> uiiit<<<« 

 ■lioatliinR KtipiilM forming a Rhoath. 



