302 HANDBOOK OF BRITISH MOSSES. 



1. S. muticum, Schimp. ; stem very short; leaves widely 

 ovato-acuminate, concave, connivent ; nerve rarely excurrent ; 

 sporangium erect, immersed. Hook. Wils. t. v. ; Eng. Bot. 

 t. 2027. ; (Moug. $ Nest. n. 1204.) 



In fallow fields, etc. Bearing fruit in autumn and spring. 



Dioicous ; gregarious, dull-green or brownish. Leaves very 

 broad and concave, forming a little ovate, pointed, bulb-like 

 mass, toothed or entire above ; margin plane ; perichsetial 

 leaves convolute ; spores pale, globose ; leaf-cells smaller than 

 in the next species. 



2. S. triquetrum, Schimp. ; stem very short ; leaves tristi- 

 chous, connivent, obovate, boat-shaped, strongly keeled ; 

 margin reflexed ; nerve excurrent, the tip recurved ; sporan- 

 gium horizontal on a long, slender, curved fruitstalk, im- 

 mersed. Hook, fy Wils. t. xxxvii. ; Eng. Bot. t. 2901. ; (Moug. 

 $ Nest. n. 802.) 



On the ground, at the top of cliffs, near the sea. Sussex. 

 Bearing fruit in spring. 



Monoicous ; gregarious at first, pale-green, then reddish. 

 Leaves very concave, closely embracing the sporangium and 

 forming a subglobose bulb-like mass; the subdimidiate veil 

 soon parts from the sporangium, and often adheres by the en- 

 tire side to the vaginula ; leaf-cells and spores larger. 



114. MICROBBYUM, Schimp. 



Sporangium immersed, roundish-ovate on a very short fruit- 

 stalk, with a blunt beak or apiculus; veil large, many-lobed, 

 erect ; leaf-cells small, rhomboid. 



1. M. Floerkeanum, Schimp. Hook. Wils. t. xxxvii.; 

 Eng. Bot. t. 2887. 



In fields. Durham, Yorkshire, and Sussex. Bearing fruit 

 late in autumn. 



