246 The North American Cup-Fungi 



Pileus large and umbrella-like; spores 

 small, 8-9 X 17 M- 

 Stem long, reaching a length of 



10 cm. 8. E. californica. 



Stem short, reaching a length of 



3-5 cm. 9. E. umhracuUformis. 



Pileus not widely spreading or um- 

 brella-like. 

 Spores narrow-ellipsoid, containing 

 two oil-drops. 

 Pileus medium large; stem 



reaching a length of 6-8 cm. 10. E. iufula. 

 Pileus very small; stem not ex- 

 ceeding 1-2 cm. in length. 11. E. brevissima. 

 Spores broad-ellipsoid, containing 



one oil-drop. \2. E. albipes. 



Spores large, rough, 12-14 X 30-35 yu. 



Spores fusoid, strongly apiculate. 13. E. caroUniana. 



Spores ellipsoid, not strongly apicu- 

 late. 14. E. Underwoodii. 

 Spores globose. 15. E. sphaerospora. 



1. Elvela Mitra L. Sp. PI. 1180. 1753. (Plate 39, fig. 1.) 



Elvela nigricans Schaeff. Fung. Bavar. 4: Ind. 102. 1774. 

 Elvela lacunosa Afz. Sv. \'et. Akad. Handl. 304. 1783. 

 Elvela sulcata Afz. Sv. \'et. Akad. Handl. 305. 1783. 

 ?Elvela grisea Clements, Bot. Surv. Nebr. 4: 8. 1896. 

 Leptopodia elastica Bond. Hist. Class. Discom. 37. 1907. 



Pileus mitrate, irregularly saddle-shaped or occasionally sub- 

 gloJDose, the margin reflexed and adnate with the stem at various 

 points, occasionally extending down the stem for some distance, 

 reaching a diameter of 2-5 cm.; hymenium even or irregularly 

 convolute, dark brownish-black; stem reaching a length of 10 

 cm. and a diameter of 2 cm., usually enlarged below and gradually 

 attenuated above, deeply fluted, yellowish, becoming smoky; 

 asci cyhndric, 8-spored, reaching a length of 200 ju and a diameter 

 of 16//; spores ellipsoid, usually containing one large oil-drop 

 which almost fills the spore, about 12 X 20 m; paraphyses en- 

 larged at their apices, reaching a diameter of 5 /x, pale yellowish- 

 brown. 



On damp soil. 



Type locality: Europe. 



Distribution: New York to British Columbia and south to 

 Mexico; also In Europe. 



Illustrations: Micheli, Nov. PI. Gen. pi. S6, f. 7; Schaefif. 



