270 The North American Cup-Fungi 



Our material agrees with Rehm's description except the color 

 which is bright-yellow rather than rose-red. It differs from 

 Lachnella arida with which it is thought by some to be identical, 

 in its larger spores and asci. The two forms are easily confused. 



48. Lachnella populicola Seaver, sp. nov. 



Apothecia thickly gregarious, sessile, or subsessile, at first 

 globose, becoming expanded with the margin incurved, reaching 

 a diameter of 1-1.5 mm., externally clothed with brown hairs; 

 hymenium pale-yellow; hairs blunt, septate, pale-brown, ex- 

 ternally minutely roughened, reaching a length of 80-90 /x and a 

 diameter of 5-6 /x; asci clavate reaching a length of 50-55 /i and 

 a diameter of 5-6 m. 8-spored; spores 2-seriate, fusoid, about 

 2 X 8-9 ij.; paraph\ses lanceolate, reaching a diameter of 4 ^l. 



Apotheciis sessilis vel subsessilis, 1-1.5 mm. diam., extus pilis brunneis 

 vestitis; ascis clavatis, 5-6 X 80-90 m, 8-sporis; sporis fusoideis, 2 X 8-9 m; 

 paraphysibus lanceolatis. 



On old wood of Popuhis tremiiloides. 



Type locality: Tolland, Colorado. 



Distribution: Colorado. 



This species closely resembles L. popidina but differs in its 

 smaller spores and asci and in having lanceolate paraphyses. 

 From external characters the two can scarcely be distinguished. 



49. Lachnella populina Seaver, sp. nov. 



Apothecia thickly gregarious, sessile, or subsessile, at first 

 globose, becoming expanded but with the margin incurved, 

 when dry either rounded or hysteriform, reaching a diameter of 

 1-1.5 mm., externally densely clothed with brown hairs; hymeni- 

 um >ellowish-brown in dried specimens (the color in living 

 material was not indicated); hairs cylindric, flexuous, reaching 

 a diameter of 5-6 /x and a length of 150 m, brown, roughened with 

 minute granules; asci rather short and stubby, cylindric, scarcely 

 narrowed at the base, reaching a length of 65-80 n and a diameter 

 of 9-10 m; spores obliquely 1 -seriate, or becoming 2-seriate to 

 irregularly disposed, straight, or slightly curved, irregularly 

 fusoid, 4 X 13-15 /x, or occasionally as long as 18 /x; paraphyses 

 clavate, rather strongly enlarged above where they reach a 

 diameter of 4 n. 



Apotheciis dense gregariis, breve stipitatis vel subsessilis, palHde flavidis 

 1-2 mm. diam.; ascis clavatis, 7-10 X 90-100 m, 8-sporis; sporis fusoideis, 

 3-4 X 7-10 /x; paraphysibus filiformibus, 2-3 /x diam. 



