60 HANDBOOK OF BRITISH MOSSES. 



Oedee XXXII. PSASOEI. 



Sporangium indehiscent ; peristome none. 



Genus 109. Pleuridium. — Fruitstalk short; sporangium 

 apiculate, lateral after innovation ; upper leaf-cells narrow. 



Genus 110. Phascum. — Columella persistent ; veil regularly 

 cucullate ; prothallus fugacious ; upper leaf-cells rather lax. 



Genus 111. Bryella. — Sporangium roundish, exserted; lid 

 defined; ring adnate; veil cucullate, scabrous above; upper 

 leaf-cells chlorophyllous. 



Genus 11 2. Cycnea. — Sporangium globose; fruitstalk curved 

 upper leaf-cells minute, subquadrate. 



Genus 113. Spharangium. — Sporangium globose, erect, or 

 pendulous; veil mitriform; spore-sac separable; leaf-cells 

 large; prothallus fugacious. + 



Genus 114. Microbryum. — Sporangium subovate ; veil large, 

 many-lobed ; leaf-cells small, rhomboid. 



Genus 115. Physcomitrella. — Sporangium globose; colu- 

 mella thick ; veil campanulate, at first subvesicular ; leaf-cells 

 large, hyaline. 



Genus 116. Ephemerella. — Prothallus persistent; sporan- 

 gium immersed ; veil cucullate ; spores large ; upper leaf-cells 

 subhexagonal. 



Genus 117. Ephemerum. — Prothallus persistent ; spo- 

 rangium immersed; veil mitriform; spores large; leaf-cells 

 large, hyaline. 



Genus 118. Archidium. — Sporangium globose; lid none; 

 columella fugacious ; veil torn in the centre ; spores very large, 

 few in number. 



Section III. — Syncladei. 



Branches fasciculate ; fruit at length cladocarpous ; recep- 

 tacle elongated. 



