Helotium 



117 



On exposed roots of Polygonum 

 and Collinsonia. 

 On woody plants. 



On bud scales of Populus. 

 Not on bud scales. 



On the wood or woody stems. 

 Apothecia waxy-white, on 



rotten wood. 

 Apothecia yellow, or yellow- 

 ish on woody stems. 

 Paraphyses lanceolate, 

 on Spiraea. 



Paraphyses not lanceo- 

 late. 

 On bark of Acer and 



quince. 

 On bark of Carpinus. 

 On branches of Cor- 

 nus. 

 On leaves. 



Apothecia white, minute, 



on Cassandra. 

 Apothecia yellow or orange. 

 On leaves of Populus 



and Betula. 

 On leaves of Quercus 

 and pods of Gleditsia. 

 Apothecia yellowish-brown 

 or brown. 

 On sandy soil, probably on submerged roots. 



50. H. rhizicola. 



51. H. gemmarum. 



52. H. Craginianum. 



53. H. lanceolato- 



paraphysaHim. 



54. H. albuminum. 



55. H. ammoides. 



56. H. propinqnnm. 



57. H. Cassandrae. 



58. //. Friesii. 



59. H. midlandense. 



60. H. umhrinum. 

 6\. H. arenicola. 



1. Helotium fastidiosum Peck, Ann. Rep. N. Y. State Mus. 27: 

 107. 1875. 



Calycina fastidiosa Kuntze, Rev. Gen. PI. 3^: 448. 1898. 



Apothecia small, stipitate, pale-yellow, reaching a diameter 

 of about 1 mm., rarely larger; hymenium plane, or slightly con- 

 cave, yellow; stem slender, about equal in length to the diameter 

 of the apothecium, brownish, or yellow with a brownish base; 

 asci narrow-clavate, reaching a length of 80-100 /x and a diameter 

 of 9-12 jj., 8-spored; spores crowded, or 2-seriate, elongate, sub- 

 clavate, multiguttulate, about 4 4.5 X 32 /x; paraphyses slender. 



On petioles and midribs of fallen leaves of Alnus in wet 

 places; also reported on catkins of (Alnus?). 



