— Ill — 



ir* 



mi 



Incrassate, of the cell walls, thickened; of 

 q^qOq..^ the cells, having thickened walls. (Fig. 9.) 



Inflated, applied to the alar cells of leaves 





^(^^^^o o! when enlarged much beyond the size of the 



^-qod 



''o'^9-F neighboring cells. (Fig. 10.) 



Lamellce, thin sheets or plates of tissue; 

 9 e. g. the plates arising from the costa of the 



hair caps and their allies. (Fig. 11.) 



Lamellate, having la- 

 mellae. 



Lamina, the blade or 

 expanded part of the leaf as 

 distinct from the costa. 



Limb, the upper part of 

 a leaf as distinct from the 

 leaf base. 



Limbale leaf, a leaf bor- 

 dered by a part of another 

 color; e. g. many species of 

 Fissidens. 



Margined, see bordered. 



Median leaf cells, those from the middle of the 



Nerve, see costa. 



Papilla:, minute rounded or acute protuberances. 



Papillose, rough with papilla?. (Fig. 3.) 



Paraphyllia, minute leaf-like or much 

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

 - E. g. Thuidium. 



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 depressions; 

 e. g. the cell wafls of the leaves of Dicranum scoparium and other 

 species. 



