196 



MOSSES WITH A HAND-LENS 



FIG. 29 



various ways on the same plant. 



Postical, used as the opposite of antical 

 for that surface of the stems of hepatics to 

 which the underleaves are attached, the under 

 or posterior surface. 



Processes. See under peristome. 

 Proliferous, bearing young shoots from 

 the antheridial or archegonial cluster of leaves. 

 Propagula. According to Dr. Best, Fig. 

 16 illustrates brood bodies or propagula rather 

 than gemmae. 



These distinctions are not made in 

 all works. 



Protonema, the green, branched, 

 alga-like threads produced from the 

 spore and often persistent during the lifetime of the 

 plant produced from it. Protonema and radicles 

 differ chiefly in the presence or absence of chloro- 

 phyll, and either may develop the other. (Fig. 31.) 

 Pseudop odium, a leafless branch resembling a 

 seta and often bearing gemmae. (Fig. 16.) Of 

 sphagnum, the stalk (false seta) bearing the capsule. 

 'I . || Pulvinate, like a cushion. 



Pyriform, pear-shaped. 



Radicles, rootlets springing from the sides and 

 base of the stem. See also protonema. 

 Ramulij minute branchlets. 

 Rhizoid. See radicles. 

 Rostellate (operculum), with a short beak. 



Rostrate (operculum), with a 

 long beak. (Figs. 6 and 8.) 



Rosulate, in the form of a 

 rosette. 



Rough. Same as papillose. 

 Rugose, wrinkled, in the case 

 of leaves it is usually applied to 

 transverse wrinkles ; e. g., leaves 

 of Hypnum rugosuin. 



Scabrous. Same as papillose. 

 Secund, twisted or turned to one side. (Fif. 32) ; e. g., leaves 

 of many Hypnums. 



FIG. 30. 



FIG. 31- 



