144 



BRITISH MOSSES. 



Plate XXI. 



BRYEiE. Part I. 

 TIMMIA. 



Generic Character. 



Capsule terminal, horizontal ; peristome double, outer of sixteen teeth, inner of 

 a membrane divided into sixty-four teeth. Leaves in eight rows. 



Fig. 1. Timmia austriaca. 

 Sheath-leaved Timmia (a) . 



Colour. Dark green. 



Stems. Long, decumbent below, erect above. 



Leaves (b) . Linear-lanceolate, base widely sheathing, coarsely serrated. 

 Flowers and Fruit. Monoicous, seta two inches long ; but barren in Britain. 

 Locality. Banks of the Isla, above Airly Castle, Forfarshire. 



AULACOMNION. 

 Fig. 2. Generic Character. 



Growing in marshes or on banks ; capsule oblong, curved above (eemuous) , 

 striated deeply ; stems erect, radiculose ; with buds (gemmce) at their ends. 



Fig. 3. Aulacomnion palustre. 



Marsh Thread Moss (a) . 



Colour. Yellow green, rusty-looking', from the thick mats of radicles which beset 



the stem. 

 Stems. Long, much branched. 



