244 The North American Cup-Fungi 



Peziza Laricis Rehm, Grevillea 4: 169. 1876. 

 Lachnea calycina Gill. Champ. Fr. Discom. 71. 1880. 

 Helotium Willkommii Wettestein, Bot. Cent. 31: 285. 1887. 

 Trichoscypha WiUkommii Boud. Hist. Class. Discom. Eu. 125. 1907. 

 Trichoscyphella WiUkommii Nannf. Nova Acta Soc.Sci. Upsal. IV. 8: 300. 1932. 



Conidial stage which precedes the apothecial stage consists 

 of waxy, whitish stromata with irregular labyrinthiform cavities 

 in which the microconidia are abstricted from the tips of slender, 

 subulate, simple, or verticillately-branched sporophores; micro- 

 conidia hyaline, simple, ellipsoid, or allantoid, 1-2 X 2-8 n. 



Apothecia sessile, or short-stipitate, scattered, or gregarious 

 in small groups and occasionally several closely crowded to- 

 gether, at first closed and rounded, becoming expanded and 

 finally scutellate, externally white and clothed with a dense 

 covering of white hairs, reaching a diameter of 13 mm., hy- 

 menium becoming nearly plane, yellow to orange; hairs flexuous, 

 of nearly uniform thickness throughout their length, minutely 

 roughened; asci cylindric-clavate, reaching a length of 100-120 n 

 and a diameter of 8-10 ^u, 8-spored; spores ellipsoid, often with 

 the ends narrowed, hyaline, granular within, 6-8 X 15-20 )u, or 

 rarely as long as 25 ju; paraphyses slender, clavate, reaching a 

 diameter of about 3 /i. 



On branches of Larix europaea. 



Type locality: Europe. 



Distribution: Massachusetts to Idaho; also in Europe. 



Illustrations: Hartig, Text-book Dis. Trees (trans.) 119, 

 /. 58, 59; Boud. Ic. Myc. pi. 518 (in part); Mycologia 26: pi. 9, 

 f. 1-5, pi. 10. 



2. Lachnella occidentalis (Hahn & Ayers) Seaver, comb. nov. 

 Dasyscypha occidentalis Hahn & Ayers, Mycologia 26: 90. 1934. 



Conidial stage consisting of a fleshy stroma with irregular 

 labyrinthiform cavities in which the microconidia are abstricted 

 from the tips of slender, pointed, verticillately branched sporo- 

 phores; microconidia ellipsoid, or allantoid, simple, 1-1.5 X 2-5 /x. 



Apothecia fleshy, abundant, scattered, or grouped, at first 

 globose and closed, opening in a roundish form, the margin 

 incurved, later expanding and becoming saucer-shaped under 

 moist conditions, laterally compressed and closed when dry, 

 short-stipitate, externally densely clothed with white hairs, 

 reaching a diameter of 1-3 mm., salmon-orange; hairs long, 



