344 NORTH AMERICAN FLORA [VoLumME 9 
Myce. 113. 1838.) Reported from New Jersey by Ellis, from Minnesota by Johnston, and 
from New York by Kauffman. 
35. OMPHALINA Quél. Ench. Fung. 42. 1886, 
Pileus umbilicate, the margin at first incurved, solitary or gregarious: lamellae decurrent: 
spores hyaline: stipe central, tubular, with cartilaginous cortex. 
Type species, Omphalina hydrogramma (Fries) Quél. 
I. SPECIES OCCURRING IN TEMPERATE NortTH AMERICA, EXCEPT THOSE CONFINED TO THE 
Paciric Coast 
Pileus white. 
Pileus 4-8 mm. broad; stipe 8~16 mm. long. 1. O. buccinalis. 
Pileus 1-3.5 cm. broad; stipe 2.5-5 cm. long. 2. O. eximia, 
Pileus yellowish or yellowish-brown. . 
Pileus convex. 3. O. umbellifera. 
Pileus umbilicate or depressed. 
Lamellae crowded, narrow. 
Lamellae white. 
Stipe 4 em. long. 4. O. subcartilaginea, 
Stipe 7-10 em. long. 5. O. Dawsonii. 
Lamellae pale-lilac. 6. O. lilacifolia. 
Lamellae distant, broad. 
Lamellae white, becoming yellowish; spores subglobose, 4-5 u 
long. . 7. O. strombodes. 
Lamellae bright-yellow; spores oblong-ellipsoid, 10-11 4-5 pn. 8. O. chrysophylla. 
Pileus brick-red or reddish-brown. 9. O. subhepatica. 
Pileus gray, brown, or fuliginous. 
Hymenophore occurring on soil. 
Pileus 6-11 mm. broad; spores 7.5-10 X 4-6 u. 10. O. rustica. 
Pileus 10-20 mm. broad; spores sutbglobose, 4 wu. 11. O. Volkertii. 
Hymenophore occurring on dead wood or in sphagnum. 
Pileus 6-12 mm. broad; lamellae yellow. 12. O. subclavata. 
Pileus 12-24 mm. broad; lamellae whitish to cinereous. 13. O. Epichysium. 
II. SPECIES OCCURRING ON THE Paciric Coast 
Pileus some shade of yellow or yelloWish-brown. 
Lamellae white. 
Lamellae crowded. 14. O. Sequoiarum. 
Lamellae distant. 3. O. umbellifera. 
Lamellae yellow. 
Pileus pale-luteous to almost orange. 15. O. luteicolor. 
Pileus yellowish-brown. 8. O. chrysophylla. 
Pileus brick-red or reddish-brown. 9. O. subhepatica. 
Pileus avellaneous or fuliginous. 
Pileus convex, sometimes umbonate. 16. O. hypobrunnea. 
Pileus umbilicate. 13. O. Epichysium. 
TI. SPECIES OCCURRING IN TROPICAL NorTH AMERICA 
Pileus white or whitish. 
Pileus about 1 cm. or less broad. 
Pileus about 5 mm. broad; stipe 6 mm. long. 17. O. niveicolor. 
Pileus 8-13 mm. broad; stipe 1-4 cm. long. 
Pileus not umbonate. : 
Stipe 2 cm. long; pileus 13 mm. broad. 18. O. subscyphoides. 
Stipe 4 cm. long; pileus 8 mm. broad. 19. O. tepeitensis. 
Pileus umbonate. 
Pileus convex, with an abrupt, small umbo. 20. O. cuspidatella. 
Pileus conic, with a long, pointed umbo. 21. O. acuminata. 
Pileus 3 cm. or more broad. : 
Pileus convex to umbilicate; lamellae distant, 22. O. collybiiformis. 
Pileus infundibuliform; lamellae crowded. 23. O. jalapensis. 
Pileus yellow or yellowish. 
Pileus infundibuliform, 1~1.5 em. broad. 
Sa Pera 24. O. lenta. 
urface flavovirens, becoming melleous. 
are othe 2-3 em. broad. aoe Gs forla: 
tipe 1 mm. thick. 5 
os Pi eae mm. thick. o o alae 
‘ileus umbrinous. j 
Pileus red of reddish. 28. O. chondripes. 
ileus 6 mm. broad; lamellae distant. int 
Pileus 12 mm. broad; lamellae crowded. 30° o ee 
Pileus 2.5 em. broad. « 31. O. incarnaia. 
