ILLUSTRATED GLOSSARY— Continued. 



Pinnate, having numerous equi- 

 distant spreading branches on each 

 side, like a feather. (Fig. 26. ) 



Plumose, feathery. 



Polygamous, with antheridia and 

 archegonia disposed in various ways 

 on the same plant. 



Proliferous, bearing young Shoots 

 from the antheridial or archegonial 

 cluster of leaves. 



Protonema, the green, branched, alga-like threads produced 



from the spore and often persist- 

 ent during the lifetime of the 

 plant produced from it. Pro- 

 tonema and radicles differ chiefly 

 in the presence or absence of 

 chlorophyll, and either may de- 

 velop the other. (Fig. 27.) 



Pseudopodium, a leafless branch 

 resembling a seta and often bearing gemmse. (Fig. 25.) 

 Pulvinate, like a cushion. 



Radicles, rootlets springing from the sides and base of stem. 

 See also protonema. 



Ramuli, minute branchlets. 

 Rhizoid, see radicles. 



Stoloniferous stem, a slender creeping stem with minute 

 leaves. 



Tomentose, covered with a thick felt of radicles. 



TERMS USED IN DESCRIBING THE SI'OROPHYTE. 



Acicular. needle-shaped. Applied to the beak of the oper- 

 culum. 



Amphithccium, the outer layers of cells of the sporogonium. 

 Annulus, a specialized ring of vesicular cells 

 'phy. between the mouth of the capsule and the lid. 

 7/># These cells are often highly elastic and aid in 

 removing the lid when the spores are ripe; they 

 have a peculiar appearance, which is well illustrated in Fig. 2S. 



