Mosses and Lichens 



A. hetetoftichum. 

 Stem. 



margin saw-toothed from the middle up- 

 ward; vein (costa) yellow-brown, vanishing 

 below the apex. 



Habit of flowering. 

 Male and female flowers on 

 one plant (monoicous). 

 The male flower-clusters, 

 sessile along the stems, 

 and with rootlets at the 

 base. The inner leaves of 

 the clusters broadly ovate- 

 concave, abruptly pointed 

 and veined. 



Veil (calyptra). Split 

 up one side. 



Spore-case. Oblong, slightly incurved 

 and inclined. 



Pedicel (seta), Short, erect. 



Lid (operculuni). Con- 

 vex, obtusely short-beaked. 

 Annulus. Large, roll- 

 ing back as the lid falls*. 



Teeth ( peristome ) . 

 Large, the inner segments 

 open, but not disjoined, 

 cilia 2 to 3. 



Spores. Mature 

 in June. 



Distribution. 

 Asia, Japan, North 



Old spore-case. . 



A. heterostichum. America. 



Antheridia and 



paraphyses. 

 heterostichittn. 



A. heterostichttm. Leaves. 



