Part 1, 1914] AGARICACEAE 



69 



15. V, rubens. 



Volva fragile, adnate to the pileus and stipe as warts, patches, or scales; 



pileus rarely smooth throughout, often becoming smooth with age. 



Context staining reddish when wounded ; pileus usually dull -reddish. 



Stipe staining reddish below when bruised, tomentose to floccose- 



scaly; pileus flavous to some shade of melleous. 16. V. jlavorubescens. 



Neither context nor stipe becoming reddish when wounded. 



Pileus dark-brown, smooth throughout, margin not striate. * 17. V. Morrisii. 



Pileus pale-yellow to orange. 



Pileus pale-yellow, 4-5 cm. broad, tub ercul ate -striate on the 

 margin; stipe smooth, glabrous; volva fragile, subappressed 

 to the bulbous base. 18. V. russuloides. 



Pileus chrome-yellow to orange-yellow, 3-8 cm. broad; stipe 

 slender, smooth, with the remnants" of the fragile, yellowish 

 volva at the base. 19, y. Frostianus. 



Pileus orange to yellow, 8-20 cm. broad; stipe usually rough, 



with concentric, margined scales adnate to the bulbous base. 20. V. muscarius. 

 3 ^ some shade of melleous or yellowish-brown, at times 

 tinged with green; species known only from Washington 

 and Oregon. 



Pileus 6 cm. broad. 21. V. praegemmatus. 



Pileus 10-20 cm. broad. 22. V. Lanei. 



Pileus and stipe distinctly rose-tinted. 23. V. roseitinctus. 



Pileus milk-white or grayish, tinged with yellow at times. 

 Pileus 2.5—5 cm. broad. 



Pileus milk-white; spores oblong, 4^5 X 2 /*; species con- 

 fined to Mexico. 24. V. mexicanus. 

 Pileus usually grayish; spores globose, 7.5-10//; species 



confined to New England. 25. V. crenulatus. 



Pileus 5-20 cm. broad, white to grayish, pulverulent, warty, 

 or spiny; stipe bulbous or radicate; odor often strong, 

 resembling chlorin; spores ellipsoid, 7-14X5-9 /jl. 26. V. solitarius. 



1. Venenarius bivolvatus (Peck) Murrill, Mycologia 4 : 241. 1912. 



Amanita bivolvata Peck, Bull. Torrey Club 36: 329. 1909. 



Pileus fleshy, convex or nearly plane, 7-10 cm. broad; surface at first viscid, white, brown- 

 ish in the center, striate on the margin; context white; lamellae free, white, crowded, unequal; 

 spores globose or broadly ellipsoid, smooth, hyaline, 10-12X8-10^; stipe equal, white, floccu- 

 lose, solid, 13-15 cm. long, 1.5-2.5 cm. thick; annulus narrow, white, often disappearing with 

 age; volva large, thick, soft, spongy, lobed on the outer margin and having an elevated entire 

 nner margin surrounding the stipe. 



Type locality: Claremont, California. 



Habitat: Under oak trees. 



Distribution: Known only from the type locality. 



2. Venenarius Caesareus (Scop.) Murrill, Mycologia 5: 73. 1913. 



Agaricus Caesareus Scop. Fl. Cam. ed. 2. 2: 419. 1772. 



Amanita Caesar ea Pers. Syn. Fung. 252. 1801. 



Amanita pellucida Banning & Peck; Peck Ann. Rep. N. Y. State Mus. 44: 178. 1892. 



Pileus hemispheric to expanded, 8-16 cm. broad; surface red, orange, or yellow, rarely 

 pale-yellow, smooth, shining, occasionally decorated with a patch from the volva, margin 

 thin, deeply striate; context yellow, unchanging, mild and agreeable to the taste, odor none; 

 lamellae free, subcrowded, bright-yellow; spores ellipsoid, smooth, hyaline, 8-11X6-7/*; 

 stipe cylindric or subventricose, not bulbous at the base, white or pale-yellow, slightly floccu- 

 lose, stuffed, 10-16 cm. long, 1-2 cm. thick; annulus ample, white or pale-yellow, apical; volva 

 large, membranous, tough, white, forming a wide, free cup with lobed or toothed margin. 



Type locality: Carniola. 



Habitat: In woods. . . 



Distribution: New England to Alabama and west to Ohio; also m Europe and Asia. 



Illustrations: Ann. Rep. N. Y. State Mus. 48: pi. 15; Atk. Stud. Am. Fungi/. 72, pi. 19, f.2; 

 Bull. Herb. Fr. pi. 120; Bres. Funghi Mang. pi. 1; Dufour, Atl. Champ, pi. 2; Gill. Champ. Fr. 

 pi. 4 (7); Krombh. Abbild. pi. 8; Richon & Roze, Atl. Champ, pi. 2; Vitt. Descr. Funghi Mang. pi. J. 



Exsiccati: D. Sacc. Myc. Ital. 401; Rav. Fungi Am. 406; Shear, N. Y. Fungi 1. 



3. Venenarius spretus (Peck) Murrill, Mycologia 5: 73. 1913. 



Agaricus (Amanita) spretus Peck, Ann. Rep. N. Y. State Mus. 32: 24. 1879. 



Pileus subovoid to convex, at length expanded, 7-12 cm. broad; surface white or pale- 

 grayish-brown, sub viscid, glabrous or with few volval fragments, faintly striate on the margin ; 



