26o NATURAL HISTORY BULLETIN. 



The plants of this genus are very common and readily dis- 

 tinguished by their external covering of hairs. Three species 

 are described here of the eight or ten collected near Iowa 

 City, the rest to appear later. 



KEY TO THE SPECIES. 



a — Receptacle cup-shaped, hymenium white or blu- 

 ish white ...... L. hemispherica. 



a — Receptacle expanded, hymenium nearly plane, 

 b — Hairs on the exterior sharp pointed, hymenium 



scarlet . . . . . . . L. scutellata. 



b — Hairs on the exterior flexuose, hymenium, 



reddish brown ...... Z.. tnelaloma. 



Lachnea hemispherica {Wigg.) Gill. 

 Plate VII, fig. i. 



1791 Peziza labellum Bulliard, Champ. , t. Ill, p. 204 



1801 Peziza hemispherica Persoon, Fung. , II, p. 204. 



1824 Peziza hemispherica Fries, Syst. Myc. , p. 82. 



1839 Peziza hemispherica Link, Handbk. , III, p. 323. 



1960 Peziza hemispherica Berkeley, Brit. Fung. , p. 367. 



1871 Peziza hemispherica Cooke, Handbk. of Brit. Fung., II, p. 680. 



1874 Peziza hemispherica Cooke, Grev. Ill, p. 73, pi. 23, fig. 95. 



1882 Peziza hemispherica Ellis, N. A. Fungi. No. 837. 



1887 Lachnea hemispherica Phillips, Brit. Disc., p. 211. 



1889 Lachnea hemispherica Saccardo, Sulloge Fung., VIII, p. 166. 



1897 Lachnea hemispherica Engler-Prantl, Pflan. Famil. I, i, p. 180. 



1900 Lachnea hemispherica Durand, Bull. Tor. Bot. Club, 27, p. 478. 



1902 Sepultaria albida Morgan, Jour, of Myc. 64, p. 188. 



Cups scattered, sessile, hemispherical, entire, .5 to 1 inch in 

 diameter, margin at first incurved; externally brown, covered 

 with brown, rigid, septate hairs, more numerous near the 

 margin; hymenium bluish white; asci cylindrical or slightly 

 enlarged upwards; sporidia 8, elliptic, 2-guttulate, asperate, 

 20 to 22 by 10 to 13 microns; paraphyses septate, clavate at 

 the apices. 



Habitat — On the ground in damp shady woods; Iowa City. 



A very common species on naked soil in woods about Iowa 

 City. The plants are at first almost spherical, gradually open- 

 ing until they become hemispherical, as the name implies. 



