184 



Spores 10-12 fi X 5 /"» oblong ; stipe pale pruinose above, brovvn-fibrillose at base. 



I. infelix Peck 



io. Spores stellate-spinulose ;pileus 3-5 em. I. asterospora Quelet 



Spores tuberculate or nodulose. II. 



Spores angular, not tuberculate or spiny ; pileus 2-2.5 cm - 



/. cicatricatus El. & Ev. 



II. Pileus yellowish-brown or lilac-brown with the disc white. I. albodisca Peck 

 Pileus uniform in color or the disc darker. 12. 



12.* Pileus large, 3-5 cm.; spores obtuse-tuberculate, 8^. 



/. margarispora (Berk.) Sacc. 

 Pileus, smaller, 1-2.5 cm - I 3- 



13. Pileus dark brown, spores about 8 X 6 ft. I. ttmboninota Peck 



Pileus yellowish-brown, the umbo black-brown ; spores 10-13 X 5 - 6,«. 



/. radiata Peck 

 Section Velutinae 



1. Spores smooth. 2. 

 Spores rough, angular or tuberculate. 4. 



2. Spores 10-12 /iX 5-6 11 ; pileus pale-fuscous, umbo darker. I. agglutinata Peck 

 Spores 8 X 5 i"- 3 • 



3. Stipe whitened by a silky coating ; pileus mouse-color, tinged lilac. 



7. murino-lilacina El. & Ev. 

 Stipe glabrous, apex farinose ; pileus white, yellow, lilac or brown. 



I. geophylla (Sow.) Gillet 



4. Pileus white or whitish. 5- 

 Pileus some shade of brown. 6. 



5. Pileus 2-3 cm. ; spores 10 X 7 P- I- commixta Bres. 

 Pileus 1-2 cm. ; spores 8 X 5 M- !• paludinella Peck 



6. Pileus gray, disc blackish-brown, 8-16 mm. ; spores 7 - ^// X 5/"- 



/. nigrodisca Peck 

 Pileus uniform in color or nearly so. 7- 



7. Pileus pale chestnut to ochraceous ; spores subglobose, 7-8 fi. 



I. subexilis (Pk.) Sacc. 

 Pileus umbrinous ; spores 12 fi. I. sabuletorum ( B. & C. ) Sacc. 



Section VlSClDAE 



1. Pileus white or whitish; lamellae white to fuscous. I. vatricosa ( Fr. ) Ouelet 

 Pileus yellowish ; lamellae pinkish-gray. /. trechispora (Berk.) Sacc. 



SHORTER NOTES 



A Fern new to the United States. — A specimen collected 

 in the " Cedar Hammock " of Sumter County, Florida, by Fred- 



* Numerous forms occur in the neighborhood of New York City that do not agree 

 with any of these three. They doubtless represent several undescribed species. 



