Paxina 209 



its entire length, roundish or angular, clothed like the outside 

 of the apothecium with brown hairs and attached at the base 

 with a dense mass of coarse, black mycelium; hairs pale-brown, 

 septate, thin-walled, flexuous, reaching a diameter of 10/x; asci 

 cylindric above, gradually tapering below, reaching a length 

 of 500 M and a diameter of 20 /x; spores 1-seriate, parallel with 

 the ascus, ellipsoid, usually containing two small oil-drops and 

 numerous granules, hyaline or faintly yellowish, 15 X 30-35 /x; 

 paraphyses numerous slightly enlarged at their apices, dark- 

 brown, reaching a diameter of 4-5 ^t. 



On rotten wood in coniferous woods. 



Type locality: Tolland, Colorado. 



Distribution: Tolland and Caribou, Colorado. 



This very characteristic species which externally very closely 

 resembles Pseudoplectania vogesiaca is based on material collected 

 June 30, 1914, by Dr. L. O. Overholts in Boulder Canyon, Col- 

 orado. A second collection was made by the late Professor E. 

 Bethel at Caribou, Colorado, July 19, 1914. It differs from 

 Paxina Corium, its closest ally, in the much larger size of its 

 spores. 



12. Paxina semitosta (Berk. & Curt.) Seaver, comb. nov. 

 (Plate 25, fig. 2.) 



Peziza semitosta Berk. & Curt. Grevillea 3: 153. 1875. 



Peziza Hainesii Ellis, Bull. Torrey Club 8: 65. 1881. 



Lachnea Hainesii Sacc. Syll. Fung. 8: 186. 1889. 



Fuckelina semitosta Kuntze, Rev. Gen. PI. 2: 852. 1891. 



Scutellinia Hainesii Kuntze, Rev. Gen. Pi. 2: 869. 1891. 



Sepultaria giganlea Clements, Bot. Surv. Nebr. 5: 8. 1901. 



Sepidtaria semitosta Morgan, Jour. Myc. 8: 188. 1902. 



Lachnea gigantea Sacc. & D. Sacc. in Sacc. Syll. Fung. 18: ii. 1906. 



Macropodia semitosta Durand, Jour. Myc. 12: 31. 1906. 



Apothecia gregarious or cespitose, rather deep cup-shaped, 

 reaching a diameter of 2-5 cm. and a depth of 2-3 cm., externally 

 brown and densely clothed with a soft tomentum; hymenium 

 creamy-white when fresh, becoming brown when old or in 

 drying; stem usually about 1 cm. long and 1-2 cm. in diameter, 

 often immersed or partially immersed, deeply lacunose, brown 

 and covered like the outside of the apothecium with tomentum; 

 tomentum consisting of brown, rather thin-walled, sparingly 

 septate, flexuous hairs which reach a diameter of 18-20 /i, of 

 nearly uniform thickness throughout their entire length, ends 



