CliondriodeniKi. 209 



Chondrioderma albescens, Phil. 



Sporangia fjlohose or slightly depressed, sessile on a hrond hasc^ 

 outer wall crustaceous, white, polished, becoming irregularly 

 ruptured above, inner wall very thin, ochraccous towards base 

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

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

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

 4;hreads of capillitium fuliginous or almost colourless, about 

 3 /x 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 vcrrucidose, 10 — 13 /x diameter. 



Chondrioderma albescens, Phil., in Herb. 



Diderma 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 

 sjiorangium are very conspicuous. The threads of the capil- 

 litium are sometimes furnished with scattered swollen portions. 



Chondrioderma simulans. Rest. 



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

 developed, chalk-white hypothallus composed mostly of lime, 

 outer wall crustaceous, clialk-ichitc, inner wall cinereous or 

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

 wliite, spherical or conical ; threads of capillitium forming a 

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

 violet ; spores dingy violet, very spinulosc, 1 2'5 ix diameter. 



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

 Syll., 1270. 



Chondrioderma Saundersii, B. and Br. 

 Sporangia scattered, sessile on a broad base, \vy\ much 



