68 



MOSSES WITH A HAND-LENS 



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 voften 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 gemmae. (Fig. 25.) 

 Pulvinate, like a cushion. 



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

 See also firotonona. 



Rajntili, minute branchlets. 

 Rhizoid, see radicles. 



Stoloniferous stem, a slender creeping stem with minute 

 leaves. 



Substratum, that upon which the plant grows; e. g., soil, 

 stones, etc. 



Tomentose, covered with a thick felt of radicles. 



TERMS USED IN DESCRIBING THE SPOROPHYTE. 



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

 culum. 



Amphithccium, the outer layers of cells of the sporogonium. 

 fi(V(JWl)/)7V7Vao Annulus, a specialized ring of vesicular cells 



between the mouth of the capsule and the lid. 



"fit 



w^/ 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. 28. 



