1 66 



MOSSES AND FERNS 



CHAP. 



yellow, or dark green, and are closely and very regularly set, 

 so that the branch has the form of a small catkin (Fig. 79, A). 



A. 



-cal 



Fig. 79. — A, Male catkin of SJi/iagnnm cymhifoliuin, x 50 ; B, young antheridium of S. acutifoluaii, 

 X350; C, opened antheridium of the same species; D, spermatozoid, X 1000 (about) : E, female 

 branch with sporogonium of .?. acuti/olunn, slightly magnified ; cal, calyptra. A, C, E, after 

 Schimper ; B, after Leitgeb. 



The antheridia stand singly in the axils of the leaves, and 

 Leitgeb ^ states that their position corresponds with that of 



1 Leitgeb (4). 



