PHASCEI. 301 



Monoicous. Stem very short; leaves spreading, elliptic, 

 lanceolate, with an excurrent nerve, distinctly papillose at 

 the back; margin recurved; sporangia on straight elongated 

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

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



112. CYCNBA, 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 ; antheridia axillary, naked. 



The translucent, smooth spores, indicated by Hedwig, are 

 extremely different from the globose, strongly echinulate 

 spores of Phascum cuspidatum, 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. If Nest. n. 606.) 



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



Monoicous ; densely gregarious, reddish. Stem very short ; 

 leaves crowded, erecto-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. SPH^EANGIUM, 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. 



