240 The North American Cup-Fungi 



Unguicularia Hohn. Ann. Myc. 3: 404. 1905. Not Unguicularia D. C. 



1825. 

 Helolachnum Torrend, Broteria 9: 53. 1910. 



Apothecia sessile, or stipitate, externally densely clothed with 

 hairs; hairs usually flexuose, smooth, or more often delicately 

 roughened; asci cylindric to clavate, usually 8-spored; spores 

 ellipsoid to fusoid, simple, or rarely pseudoseptate, paraphyses 

 filiform to lanceolate. 



Type species, Peziza corticalis Pers. 



The genus Lachnella was founded by Fries (Fl. Corpus Prov. 

 Sueciae 1: 343. 1835) on Peziza alboviolascens, a Cyphella, 

 which he apparently mistook for a discomycete as indicated by 

 the fact that a few years later (Summa Veg. Scand. 365. 1849) 

 he used the name for a genus of Discomycetes. Six species were 

 included, one of which Peziza flammea Alb. & Schw. is an opercu- 

 late and later became the type of the genus Perrotia (Bond. Bull. 

 Soc. Myc. Fr. 17: 24. 1901) and is included in our volume on 

 the North American Cup-fungi (operculates). It is proposed 

 that the name Lachnella be conserved for a genus of Discomycetes 

 as originally intended by Fries, and that Peziza corticalis Pers. be 

 adopted as the type since this is probably the most widely dis- 

 tributed and best known inoperculate species included by Fries 

 in his genus. Although not mentioned by Fries, the spores of 

 this species are much elongated, relatively large and occasionally 

 become septate at maturity although this character is by no 

 means a constant one. 



Since Fries' time various interpretations have been placed on 

 the genus by different workers. In 1887, William Phillips took 

 up the genus and used it in the same sense as Fries (1849) in- 

 cluding four of his six species, one species, Lachnella alboviolacens 

 (Alb. & Schw.) Fries, being ruled out as a Cyphella and one other 

 Lachnella rhabarbarina (Berk.) Fries being transferred to Der- 

 matea. Many other species were included in the genus by 

 Phillips. No particular stress was placed on the spores but the 

 genus was described as follows: 



''Cups small, stipitate or sessile; flesh thin, firm, ivaxy; externally 

 pilose or villous; asci cylindrical or subclavate; sporidia 8, colour- 

 less; paraphyses filiform or acerose.'' 



In 1884, Saccardo (Bot. Cent. 18: 216) recognized the genus 

 as follows: "(Lachnella et Helotium e. p. Erinella Quel. e. p. 



