BRITISH COLLEMACEI. 93 



Tribe II. Collemei. This includes also some species of 

 " Pseiido-algje," viz., the Nostocs. 



I. Pyrenopsis, Nyl. as recently limited by Nylander — 

 Pyrenopsis hceviatopis. Smf, 

 Pyrenopsis licemalea. Smf. 

 Pyveiwpsis granutina. Smf. 

 Pyrenopsis hom(vopsis. Nyl. 

 Pyrenopsis fuscatula. Nyl. 

 Pyrenopsis furfurea. Nyl. 



II. CoLLEMOPSis. Nyl. Thallus glaucous green, and gonimia 



submoniliformly arranged. 

 CoUemopsis Schcereri. Mass. 

 CoUemopsis lecanopsoides. Nyl. 

 CoUemopsis furfurella. Nyl . 

 CoUemopsis oblongans. Nyl. (Grev. iii., p. 22.) 

 CoUemopsis dijfundens. Nyl. 



III. Synalissa. D.C. 

 SynaUssa symphorea. D.C. 



IV. CoLLEMA, Ach., in the following sections : — 



A. Lichinopsis. Cromb. 

 CoUeyna lichinodeum. Nyl. 



B. Pliysma. Mass. 

 CoUema chalazamim. Ach. 

 CoUema chalazanodes. Nyl. 

 CoUema myriococcwn. Ach. 

 CoUema confertiim. Ach. 



C. EucoUema. Cromb. 

 CoUema terrulentum. Nyl. 

 CoUema ceraniscum. Nyl. 

 CoUema auriculatum. Hfifm. 

 CoUema furviim. Ach. 

 CoUema pulposum. Bernh. 



«• granuldtum. Sw. 



^. compactum. Ach. 



y- kydrocharvm. Ach. 



var. 1. cer an aides. Borr. 

 var. 2. pulposiUum. Nyl. 

 CoUema sithplicatile. Nyl. 



a. meizolobvm. Nyl. 

 CoUema Umosum. Ach, 

 CoUema crispum. (Huds.) 



a. cristatulvm. Ach. 

 CoUema cheileum. Ach. 



«• malum. Scliajr. 



^' monocarpon. Duf. 

 CoUema melcemim. Ach. 



«• marginale. (Huds.) 



