Heald-Wolf: Whitening of the Mountain Cedar 211 



Cyanospora Albicedrae sp. nov. 

 Stromatibus corticis vel ligni in areis dealbatis in cortice vel 

 lignis ramorum decorticatis. Stromatibus corticis griseis ; stro- 

 matibus ligni plerumque nigrioribus, saepe atris, lignis corrodatis. 

 Pustulis omnibus plus vel minus lenticularibus, 1-2 mm. longis, 

 plerumque solitariis vel 2-3 coacervatis. Peritheciis 1-3 in 

 quoque stromate, saepius solitariis, 825-1200 X 260-400/x, hori- 

 zontalibus, elongatis in ipsa via quam axe stromatis, membranis ten- 

 uissimis, ligno vel cortice omnino immersis, ostiolo verso, leviter at- 

 tenuato. Ascis gracilaribus, cylindraceis, 700-1100X8-10/^, 

 6-8-sporis, base attenuata, membrana interna apice incrassata, 

 obtusis. Ascis maturatibus supra basem ruptis liberatisque cum 

 sporis exsertis, omnino strato glutinoso circumdatis. Paraphysi- 

 bus multis, simplicibus, continuis, ifx diam. Sporidiis numquam 

 rectis, plerumque curvulis vel contortis, pleuriseptatis, 600-1000 

 X 3/>t, hyalinis vel cyanophyceis, loculis leviter longioribus quam 

 latis. 



Hab. In cortice vel decorticato ligno Sahinae sabinoidis vi- 

 ventis. 



Relationship 



This genus is apparently to be referred to the Ceratostomaceae, 

 being perhaps most closely related to Ophioceras, from which it 

 differs in several respects. The most important of these are 

 shown in the following tabulation : 



Cyanospora Ophioceras 

 r horizontal f erect 



Perithecia J in stromatic nodules J not in stromatic nodules 



I solitary or 2-3 I solitary 



Ostiolum very short elongated 



Asci J thickened at apex J not thickened 



") in gelatinous matrix | gelatinous matrix absent 



Spores very long long 



This indicates differences which would seem to be worthy of 



generic rank. 



School of Botany, 



University of Texas, 

 Austin, Texas. 



