GLOSSARY OF TERMS USED 203 



Spore-sack, the portion of the interior of the capsule in which 



the spores are formed. 

 Spores, extremely minute round bodies produced in the capsule, 



and from which future plants are developed. 

 Squarrose, spreading out ; of the leaves when standing out from 



the stem. 



Stipules, see Under-leaves. 

 Stomata, small pores or openings in the capsule walls of certain 



mosses (p. 55). 

 Struinose (Latin struma, a wen) ; of the capsule of some mosses, 



which have a small swelling at the base (Plate IV. fig. 2). 

 Sulcate, of the capsule wall, when marked with furrows. 

 Superficial, of the pores (or stomata), when the guard-cells are 



situate on the surface of the capsule wall (Plate IV. fig. 23). 

 Synoicous, when the fertilising and fruit-bearing organs grow 



intermingled. 



Trigones, thickenings at the angles of the cell-walls of the leaves 

 of certain liverworts, generally triangular in form (p. 142). 



Tympanum, the small round membrane (the top of the columella) 

 which closes the mouth of the capsule in certain mosses 

 (P- 75). 



Under-leaves, small leaf -like growths on the under side of the 

 stem in certain liverworts. 



Vaginula, see Sheath. 

 Veil, see Calyptra. 



