56 NORTH AMERICAN SORDARIACEAE 
Hairs consisting of long flexuous mycelial strands which ramify over the 
ubstratum 
Beak absent. 12. P. erostrata. 
Beak oo 
Beak aneii with hairs. I3. P. ۰ 
Beak naked, black. 
ores uniseriate, 14. P. arachnoidea. 
Soe biseriate. 
Spores ege of a fertile cell at each end of a 
long hyaline filament. 15. P. zygospora. 
Spores ra with usually four gelatinous appendages 
at eac I6. P. vesti 
Hairs branched, roughened ar forming a dense brown felt. 
17 . Californica. 
Perithecia tubercular ١ 18, P. striata. 
erithecia covered with white tomentum. 19. P. albicans. 
Perithecia naked above the substra 
Spores completely covered by egen appendages. 
P. lon; icaudata. 
Spores with appendages confined to the ends. 21, P. decipiens. 
Primary spore appendages absent. 
Spores uniseriate 
erithecia Nm 22. P. Kansensis. 
Perithecia smooth . 23. P. brassicae. 
Spores biseriate. 24. P.multicaudata. 
erithecia hairy ation ve the substratu 
Perithecia covered with tomentum we roughened hairs. 25. P. lutea. 
Perithecia hairy but not tomentose and having no roughened hairs. 
imary spore appendages absent. 26, P. heterochaeta. 
1 2 spore appendages present. 
rs short, tufts of irregular cells. 27. P. Dakotensis. 
Hairs long and single. 
Hairs straight and more or less clustered. 28. P. curvicolla. 
Hairs flexuous and similar to the mycelium. 
29. P. collapsa." 
gie naked above the substratu 
ndary spore appendages ہلت‎ and easily e Pe QU at ma- 
turi iem pier sup 
Secondary spore appendages indistinct at maturity and = fugacio 
ade "d 
. Pleurage anomala sp. nov. 
Perithecia half sunken or entirely superficial and imbedded in 
a dense growth of greenish or brownish mycelium which is at- 
tached to the perithecium especially around the center, membrana- 
ceous, black above and dark brown below, about 300x 500 p, 
pyri riform with papilliform curved black beak. 
