174 HISTORY OF BEITISH MOSSES. 



experiment of sowing spores is recorded in corroboration of 

 this opinion. 



ZYGODON, HooL (Yoke Moss.) 



The name of this genus signifies "yoke tooth/^ from the 

 teeth of the peristome being united in pairs. Though we 

 have but one species in this country, there are a good many 

 in warmer latitudes, and in the southern hemispliere. 



Generic Character. — Seta terminal. Peristome double; the 

 outer of sixteen teeth, approaching in pairs ; the inner of eight 

 or sixteen cilia, lying horizontally. Calyptra dimidiate, smooth. 



1. Zygodon conoideus, Hook, and Taylor. {Lesser 

 Yoke Moss) Leaves acute; cilia eight. — Eng. Fl. J5. 52; 

 Mm. 8pi.pt. I. p. 667. 



Trunks of trees, chiefly in the west of Britain and Ireland. 

 In the latter, Ireland, it is said to grow frequently on the 

 Hazel and Ash. In the old romantic woods round Inverary 

 Castle, Argyleshire, we have picked it in fine condition on 

 the latter tree, associated with a very nearly allied plant, 

 the Gpmostomum {Zugodoii) viridissimum. Fr. January. 

 The leaves have a beautifully dotted appearance under the 

 microscope. ' 



