— Ill — 



~o 0Y-.9. 



allies. 



Incrassate, of the cell walls, thickened ; of 

 the cells, having thickened walls. (Fig. 9.) 



Inflated, applied to the alar cells of leaves 

 when enlarged much beyond the size of the 

 neighboring cells. (Fig. 10.) 



Lamella, thin sheets or plates of tissue; 

 e. g. the plates arising from the costa of the hair caps and their 

 (Fig. 11.) 



Lamellate, having la- 

 mellae. 



Lamina, the blade or ex- 

 panded part of the leaf as 

 distinct from the costa. 



Limb, the upper part of 

 a leaf as distinct from the 

 leaf base. 



Limbate leaf, a leaf 

 bordered by a part of an- 

 other color; e. g. many spe- 



10 



11 



cies of Fissidens. 



Margined, see bordered. 



Median leaf cells, those from the middle of the 



leaf. 



Xerve, see costa. 



Papilla, minute rounded or acute protuberances. 



Papillose, rough with papillae. (Fig. 3.) 



Paraphyllia, minute leaf-like or much 



branched organs among the leaves. (Fig. 12.) 



E. g. Thicidinm. 



Parenchymatous, cells with broad ends 



abutting on each other, not dovetailing into 



each other. (The large cells in Fig. 4.) 



Patent, spreading at an angle of 26 45 



(Braithwaite) ; spreading at an angle of 45° or more (Dixon). 



Patulous, more widely spreading than patent. 



Percurrent costa, reaching to the apex of the leaf, but not 

 beyond. 



Perichaetial, see bracts. 



Perigonial, see bracts. 



Pitted cell walls, marked with small apertures or depres- 

 sions; e.g. the cell walls of the leaves of Dicra?ium scoparium 

 and other species. 



