118 Mycologia 



New York Botanical Garden and to Dr. House of the New 

 York State Museum for the privilege of access to the types of 

 Dr. Murrill and Dr. Peck; also to the Department of Plant 

 Pathology of Cornell University for allowing me to examine all 

 of the specimens in the Atkinson herbarium. 



Synopsis of the Species of Gomphidius Occurring in the North 



Temperate Regions 

 1. Cystidia few or lacking; plants becoming black when dried. {G. glu- 

 tinosus may be sought here) 2 



1. Cystidia present and more or less abundant, long and cylindrical 3 



2. Spores 15-22 x 5.5-6.5 m; pileus 2-7 cm. broad, not umbonate, glutinous, 



pale brownish-red when fresh; eastern U. S. (See figs. 50 and 51, 

 Atkinson 1) G. nigricans. 



2. Spores 10-13 x 3.5-4.5 n; pileus 5-10 cm. broad, not umbonate, viscid, 



livid flesh-colored when fresh, becoming black-spotted; stem citron- 

 yellow below G. oregonensis. 



3. Pileus with ochraceous shades, at least when young and fresh; western 



U. S 4 



3. Pileus not noticeably of these colors 5 



4. Pileus glabrous and glutinous; spores 15-19 (22) x 6-7 m- (See descrip- 



tion) G. ochraceus. 



4. Pileus densely floccose-tomentose, dry or nearly so; spores 17-21 (24) x 



6-9 fx G. tomentosus. 



5. Pileus 5-10 (12) cm. broad 6 



5. Pileus 2.5-5 (6) cm. broad 7 



6. Pileus convex to plane, not umbonate, glutinous, livid purplish-brown; 



gills at first whitish, becoming gray to blackish at maturity; cystidia 

 few to scattered; spores 17-22 x 6-7 yn G. glutinosus. 



6. Pileus with subconic umbo, only slightly viscid, dark vinaceous-red to 



dark reddish-brown; gills at length olivaceous to purplish-umber; 

 cystidia abundant; spores 17-20 (21) x 6-7.5 m G. viscidm. 



7. Stem with yellow base or yellow more or less throughout, concolorous 



within 8 



7. Stem not yellow 12 



8. Pileus 2.5-6 (7) cm. broad 9 



8. Pileus 1-2.5 cm. broad, convex-plane, pink, with white flesh; gills distant; 



spores 22-25 (30) X 6-7.5 (8) m G. flavipes. 



9. Gills more or less forked 10 



9. Gills not forked or very rarely; stem remaining dull red and pileus sooty- 

 red when dried; pileus with subconic umbo; spores 16-21 (23) x 6-7 

 (7.5) M- (See description) G. viscidus forma Columbiana. 



10. Pileus not umbonate; stem 6-12 mm. thick 11 



10. Pileus umbonate, pale vinaceous-brown when fresh, gluten becoming 



smoky; stem 3-6 mm. thick; spores 16-19 x 5-7 n (Rea). .G. gracilis. 



11. Stem sheathed by the viscid veil, white upwards and remaining whitish 



when dried; pileus salmon-colored to vinaceous-pink; spores 14-17 (20) x 

 5-6 M- (See description) G. subroseus. 



