FIIASCEI. 301 



Monoicous. Stem very short ; leaves spreading, elliptic, 

 lanceolate, with an excurrent nerve, distinctly papillose at 

 the back; margin recur, ed; sporangia on straight elongated 

 fruitstalks, often aggregate, chestnut-brown; leaf-cells less 

 translucent than in Pliascum ; spores small, pale, echinulate. 



112. CYCNEA, Berk. 



Sporangium on a curved fruitstalk, globose, confluent with 

 the lid ; veil dimidiate, even ; spores even, translucent ; leaf- 

 cells minute above and crowded, subquadrate, elongated be- 

 low ; anthcridia axillary, naked. 



The translucent, smooth spores, indicated by Hedwig, are 

 extremely different from the globose, strongly echinulate 

 spores of Phascum cuspulatum y which, together with the 

 curved fruitstalk, different inflorescence and reticulation, in- 

 dicate a distinct genus. 



1. C. curvicolla, Berk. Hook. $ Wils. t. v.; Eng. Bot. 

 t. 905. ; (Mouff. % Nest. n. 606.) 



In open fields, on tops of walls, etc. Bearing fruit in spring. 



Monoicous ; densely gregarious, reddish. Stem very short ; 

 leaves crowded, erec to- patent, elongato-lanceolate ; nerve 

 strongly excurrent ; margin reflexed ; sporangia sometimes ag- 

 gregate; spores yellowish. Hedwig figures them with a short 

 peduncle, like that in Bovista, which I have not seen, and 

 Greville figures a similar structure in Leptotrichum glaucescens. 



113. SPELffiRANGIUM, Schimp. 



Sporangium spherical, erect, on a very short fruitstalk or 

 pendulous; veil erect, mitriform, fugacious ; columella rather 

 thick ; spore-sac separable ; spores large, subglobose, minutely 

 granulated; leaf-cells large; leaves hyaline; prothallus not 

 permanent ; male flowers rooting. 



