Chondriodenna. 209 



Chondrioderma albescens, Phil. - 



Sporangia globose or slightly depressed, sessile on a broad lasc> 

 outer wall crustaceous, white, polished, becoming irregularly 

 ruptured above, inner wall very thin, ochraceous towards base 

 of sporangium and where it passes over the columella, colour- 

 less and very delicate above; columella well-developed, more 

 or less globose, ochraceous ; mass of spores blackish-purple ; 

 threads of capillitium "fuliginous or almost colourless, about 

 3 jut thick at the base, remaining for some distance simple, 

 then branching at acute angles, towards the apices anastomosing 

 freely to form a dense, irregular net ; spores globose, lilac-brown, 

 minutely verruculose, 10 13 p diameter. 



Chondrioderma albescens, Phil., in Herb. 



JDidernia albescens, Phil, Grev., v., 5, p. 114, t. 87, f. 3,, a f ; 

 Sacc., SylL, 1291. 



(Type in Herb. Phillips.) 



On pine bark. California. 



Gregarious, or towards the margin of the clusters, scattered, 

 1 1'5 mm. diameter. After dehiscence, when the spores are 

 blown away, the bright ochraceous columella and base of 

 sporangium are very conspicuous. The threads of the capil- 

 litium are sometimes furnished with scattered swollen portions. 



Chondrioderma simulans, Host. kileiwMfc <\U 



Sporangia spherical, narrowed at the base, adnate to a well- 

 developed, chalk-white hypothallus composed mostly of lime, 

 outer wall crustaceous, chalk-ivhite, inner wall cinereous or 

 variously bright- coloured ; columella generally very small, chalk- 

 white, spherical or conical; threads of capillitium forming a 

 dense net, with triangular protuberances at the nodes, brownish- 

 violet; spores dingy violet, very spinulose, 12'5 /a diameter. 



Chondrioderma simulans, Rost., Mon. Append., p. 20 ; Sacc., 

 SylL, 1279. 



Chondrioderma Saundersii, B. and Br. I 

 Sporangia scattered, sessile on a broad base, very much 



