OF WESTERN PENNSYLVANIA 361 



Pseudopodium, in Sphagnum the false seta bearing the capsule; 



in Aulaconmiuin, etc., a leafless seta-like branch bearing 



gemmae. 

 Punctate', marked with dots. 

 Pyriform, pear-shaped. 

 Quadrate, square. 

 Radicles, rootlets or rhizoids growing out from the base of the 



stem. 

 Radiculose, covered with radicles. 

 Ramose, branching. 

 Ramidose, bearing smaller branchlets. 

 Pepand, undulately or wavy-margined. 

 Reticulate, in the form of a net-work. 



Retort Cells, cuticular cells of Sphagnum havingan outward- 

 curved apex. 

 Retiise, with the obtuse apex slightly indented. 

 Revolute, rolled backward from the margin. 

 Revoluhle, curling off, as does the annulus of many mosses. 

 Rhomboid, diamond-shaped. 

 Rostellate, short-beaked. 

 Rostrate, with a more or less long beak. 

 Rugose, wrinkled. 

 Rupestral, -inhabiting rocks. 

 Scabrotis, rough. 



Scarious, thin, dry, membraneous, but not green. 

 Secund. turned to one side. 



Segments, the main divisions of the inner peristome. 

 Serrate, with forward-projecting teeth. 

 Serrulate, minutely serrate. 

 Sessile, not stalked. 



Seta, the stalk or pedicel bearing the capsule. 

 Setaceous, bristle-like. 

 Sheathing, applied to perichtetial leaves which wrap around the 



seta or ordinary leaves wrapping around the stem. 

 Sinistrorse, twisted to the left, as is the case with the threads of 



the rather-rare "left-handed" screw or bolt. By some 



authors used in the opposite sense. 

 Sinuosc, wavy. 

 Spatnlate, spatula-like, bluntly and narrowly obovate and quite 



attenuate downwards. 

 Spinnlosc, furnished with small spines. 

 Sporangium, usually synonymous with capsule. 

 Sporaphyte, the spore-bearing generation of the moss arising: 



from the fertilization of the archegonium and known also 



as the sporogonium, — usually consisting of foot, seta, and 



capsule. 

 Squarrose, spreading abruptly and widely. 



