GRIMMIEI. 233 



1. Branclileis or innovations not fastiyiate. 



1. R. canescens, Brid. ; stem erect, much branched; 

 branchlcts short, obtuse, remote; leaves spreading and re- 

 curved, ovato-lanceolate, rough with acuminate, crenulate, 

 diaphanous points ; fruitstalk long ; sporangium ovate, some- 

 what striate when dry ; lid long, subulate ; teeth long, nodulose, 

 bipartite. Hook, ty Wil*. t. xix. ; Eng. Bot. t. 1991, 2531, ; 

 (Moug. Nest. n. 20). 



On sandy ground on heaths and mountains. Bearing fruit 

 early in spring. 



Forming large yellowish-green patches, which are hoary 

 from the diaphanous points. Leaves subsulcate, rough with 

 short almost spinulose papillae; margin recurved; fruitstalk 

 1 inch long, twisted when dry; sporangium obscurely fur- 

 rowed ; teeth of pcristome red. There are a few large rectan- 

 gular leaf-cells at the basal edges of the leaves. 



2. R. lanuginosum, Brid. ; stem decumbent, elongated ; 

 branches fasciculate; leaves slightly spreading, lanceolate, 

 their hair-like diaphanous tips eroded or subciliate ; fruitstalk 

 short; sporangium small, ovate; teeth long, slender, bipartite. 

 -Hook, fy Wils. t. xix.; Eng. Bot. t. 1348.; (Moug. % Nest, 

 n. 21). 



On the tops of mountains, also on walls and rocks. Bearing 

 fruit early in spring. 



Forming extensive soft, swollen, hoary patches. Stem 

 sometimes a foot long, irregularly branched, sometimes sub- 

 pinnate ; leaves ovate below, varying in length, minutely 

 papillose except at the top ; margin slightly recurved ; fruit- 

 stalk rather rough, short ; veil rough at the tip ; ring broad ; 

 teeth of peristome very slender, bipartite, nodulose. 



I do not find the large cells at the base as in the last species, 

 though those of the extreme edge are rectangular. 



