202 A Monograph of the Myxogastres. 



thick, irregularly rugulose, expanding at the base into a small 

 hypothallus, pale ochraceous ; columella cylindraceo-clavate, nearly 

 Jialf the height of the sporangium, smooth, pallid ; mass of spores 

 blackish- violet; capillitium copious, threads dingy lilac, 3 3'5/* 

 thick at the base, tapering, branching irregularly and anasto- 

 mosing laterally, furnished with numerous elongated swellings 

 usually containing a few dark granules; spores globose, deep 

 violet, almost opaque, coarsely warted, 13 15 p diameter. 



On thin decorticated twigs. Fort Colville, Canada. (Dr. 

 Lyall.) 



(Type in Herb., Kew.) 



From 1'5 2 mm. high, with the habit of Chondrioderma 

 Oerstedii, differing in the highly developed columella and irregular 

 mode of dehiscence. 



Chondrioderma Carmichaeliamim, Cooke (figs. 245 247). ' 



Sporangia spherical, quite sessile, splitting when mature into 

 4 5 acute segments, pale red, polished; columella sphericat, 

 attenuated at the base, pale red ; threads of capillitium very thin, 

 colourless, branching in a dichotomous manner, here and there 

 laterally connected ; spores globose, dark- violet, smooth, 11 13 /u, 

 diameter. 



Chondrioderma Carmichaelianum, Cooke, Myx. Brit., p. 42. 



ChondriodcrDia radiatum, Host., Mon. Append., p. 40 (in 

 part) ; Sacc., Syll., 1284 (in part). 



Uiderma Carmichaelianum, Berk., Eng. Fl., vol. v., p. 34; 

 Cooke, Hdbk., no. 1112. 



(Type in Herb. Berk., Kew.) 



On moss. Britain (Appin, N. B. ; Trifreu, Wales). 



Sporangia about '5 mm. diameter; distinguished from C. 

 radiatum in being sessile and globose, not umbilicate below, 

 and in the smooth spores. 



Chondrioderma Trevelyana, Rost. fci. 



Sporangia ovate or subglobose, sessile, wall single, polished 

 ivory coloured, splitting half way to the base into numerous 



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