IOWA ACADEMY OF SCIENCES. 
117 
FAMILY— MOLLISIACE^. 
81. Mollisia dehnii (Rabenh.) Karst. 
Plants small, parasitic on leaves and stems of Potentilla 
norvegica. Pocahontas, Iowa, summer, 1903; — Iowa City, 
summer, 1904. Not uncommon. 
82. Mollisia polygoni (Lasch.) Gill. 
Plants very small. On decaying stems of Polygonum. 
Spring and summer. Iowa City. Common. 
83. Mollisia chierea iBsbtsGh.) Karst. 
Plants rather small, grayish, sessile, margin often irregu- 
larly folded. This species seems to be very common and 
widely distributed. It occurs on various kinds of decaying 
wood. Various collections, 1904-5. Iowa City; — Decorah, 
Iowa, June 26, 1882, E. W. D. Holway. 
84. JViptera saliceti (Rehm.) Sacc. 
Plants minute, light colored. This genus is distinguished 
from the preceding by the septate sporidia. This species 
was collected on wood which was so much decayed that it 
was impossible to determine the kind of wood. Summer, 
1904. Iowa City. Not common. 
85. Orbilia clirysocoma (Bull.) Sacc. 
Plants very small, sessile, yellowish. On rotten wood. 
Iowa City; — Decorah, Iowa, August, 1882, E. W. D. Hol- 
way. This species is very common in woods. 
86. Orbilia vinosa (A. & S.) Karst. 
Plants small, similar to preceding but red instead of 
yellow. On rotten wood. Iowa City, 1904. Common. 
FAMILY— PATELLARIACE^ . 
87. Karscliia lignyota (Fr.) Sacc. 
Plants small, black; hymenium nearly plane; sporidia 
1-septate, brownish. On decorticated wood. Autumn, 1902 
Iowa City. Not common. 
88. Patellaria melaxantha Fries. 
Plants very small, yellowish, gregarious, often confluent; 
sporidia several septate. On wood. Iowa City. Rare. 
