EXPLANATION OF TEE PLATES. 113 



SUB -ORDER XII. 



GRIMMIE^. 



Plate XV. 



Chaeacteeistics op Oedee. 



Stems much branched, in tufts, erect or trailing (procumbent), growing on 

 rocks ; leaves in eight rows, areolse small ; capsule immersed, or on short pedicel ; 

 peristome generally of sixteen teeth, absent in one species ; plants hoary and 

 rather coarse looking. This order has a great affinity with Hedwigiece, with 

 which probably it ought to be united. 



SCHISTIDIUM. (Figs. 1—5.) 



GrENEEIC ChAEACTEK. (FiG. 1.) 



Capsule (a) round ; mouth wide ; columella united to the lid and falling away 

 with it (6) . Calyptra small ; base much torn. Monoicous. Leaves, hair pointed 

 and white at the apex, whence arises the hoary appearance of the plant ; becoming 

 larger and tufted towards the summit ; margins reflexed. 



Fig. 2. Schistidium confeetum. 



Close-tufted Grimmia (a) . 



Colour. Blackish, tipped with bright green. 



Stems. Branched, tufted closely, very rigid when dry. 



Leaves {b) . Erect when dry ; margin rather thickened ; areolee very small ; the 



upper with a short hair-point. 

 Capsule. Small, of thin texture. Spring. 

 Locality. Trap or sandstone rocks. The King's Park, Edinburgh. Dr. Greville 



in " Bryologia Britannica." 



