254 NATURAL HISTORY BULLETIN. 



MORCHELLA CONICA Pers. 



Plate II, fig i. 



1823 Morchella conica Fries, Syst. Myc. , II, p. 7. 



1887 Morchella conica Phillips, Brit. Disc, p. 4. 



1889 Morchella conica Saccardo, Sylloge Fung. , VIII, p. l >. 



1896 Morchella, conica Underwood, Minn. Bot. Studies, reprint, p. 493. 



1897 Morchella conica Engler-Prantl, Pflan. Famil., I, i, p. 169, fig. 141. 

 1900 Morchella conica Atkinson, Mush., p. 218, fig. 206. 



Pileus conical, or terete, oblong,' aclnate at the base, yellow- 

 ish; primary ribs longitudinal, secondary forming transverse 

 folds; pits elongated, narrow; stem cylindrical or tapering to- 

 ward the top, whitish; asci cylindrical, 8-spored; sporidia 

 elliptic, 15 to 20 by 10 to 12 microns, granular within para- 

 physes a little enlarged at their apices. 



Habitat — On the ground in spring; Iowa City. 



The principle distinction between this species and Morchella 

 esadenta Linn, seems to be in the form and external appear- 

 ance of the plants. In the species described here the primary 

 ribs tend to be longitudinal with the pileus forming oblong 

 pits which are more or less rectangular. In Morchella escul- 

 enta Linn, the pileus is more nearly rounded and the pits are 

 irregular and show no definite arrangement. 



Morchella hybrida {Sozv.) Pers. 

 Plate II, fig. 11. 



1801 Morchella hybrida Persoon, Syn, Fung. , II, p. 620. 



1823 Morchella semilibera Fries, Syst. Myc, II, p. 10. 



1828 Morchella semilibera Fries, Elench. Fung., 1, p. 2. 



1860 Morchella semilibera D.C., Berkeley, Outl. of Brit. Fung., p. 358. 



1871 Morchella semilibera D.C , Cooke, Handbk. of Brit. Fung. , II, p. 656. 



1887 Morchella semilibera D.C, Phillips, Brit. Disc, p. 7. 



1889 MoAchella hybrida Saccardo, Sylloge Fung., VIII, p. 13. 



1897 Morchella hybrida Engler-Prantl, Pflan. Famil., I, i, p. 169. 



1899 Morchella hybrida Underwood, M. M. & M. , p. 66. 



1900 Morchella semilibera D.C, Atkinson, Mush., p. 219. 



Pileus free half way up; ribs longitudinal, forming oblong 

 pits which are veined within; stem cylindrical, even, often 

 very long and enlarged at the base; asci cylindrical; sporidia 8, 



