Part 1, 1914] AGARICACEAE 75 



21. Venenarius praegemmatus Murrill, Mycologia 4: 243. 1912. 



Amanita praegemmata Murrill, Mycologia 4: 262. 1912. 



Pileus hemispheric to subexpanded, often splitting at the margin with age, scattered, 

 reaching 6 cm. broad; surface smooth, melleous-avellaneous in the center, dark-melleous on 

 the margin, not striate, densely covered with persistent, white, cottony, gemmate warts, the 

 remains of the volva; lamellae free, crowded, ventricose, white; spores ovoid to subglobose, 

 smooth, hyaline, 8-10 /z; stipe tapering upward from a bulbous base, smooth, white, reaching 

 7 cm. long and 1.5 cm. thick; annulus ample, white, persistent, fixed just above the middle of 

 the stipe; volva white, 3 cm: broad, 2 cm. high, closely attached to the bulb and scarcely 

 showing a free limft, without friable remains in the soil. 



Type locality: Seattle, Washington. 

 Habitat: In open woods. 

 Distribution: Washington and Oregon. 



22. Venenarius Lanei Murrill. 



Amanita calyptrata Peck, Bull. Torrey Club 27: 14. 1900. Not A. calyptrata Lam. 1778. 

 Venenarius calyptratus Murrill, Mycologia 4: 241. 1912. 



Pileus thick, fleshy, convex or nearly plane, 10-20 cm. broad; surface grayish-yellow or 

 yellowish-brown tinged with green, often paler or more yellow on the margin, glabrous except 

 near the center, where it is covered with a large, irregular, persistent, grayish- white fragment 

 of the volva, margin striate; lamellae adnexed, forming slight decurrent lines on the stipe, 

 crowded, yellowish-white tinged with green; spores broadly ellipsoid, smooth, hyaline, usually 

 uninucleate, about 10X6 /j.; stipe stout, rather long, equal or slightly tapering upward, white 

 or yellowish- white with a faint greenish tint, 10-15 cm. long, 1.2-2 cm. thick; volva white or 

 grayish-white, 0.5-1 cm. thick in the young stage, tough, breaking into large irregular frag- 

 ments, most of which remain at the base of the stipe. 



Type locality: Oregon. 



Habitat: In fir forests or their borders. 



Distribution: Oregon. 



23. Venenarius roseitinctus Murrill, sp. nov. 



Pileus convex, rarely expanded, solitary, 4-6 cm. broad; surface dry, salmon-colored, 

 pulverulent, with volval patches that fall away very early ; lamellae free, white, crowded ; spores 

 perfectly globose, smooth, hyaline, 7-9 /x; stipe cylindric and equal above, bulbous at the base, 

 white tinged with salmon, dry, pulverulent, solid, 8-15 cm. long, 1.5-2 cm. thick; veil mem- 

 branous, white tinged with salmon, superior, rarely persisting as an annulus; volva salmon- 

 colored, fragile, not forming a cup. 



Type collected in sandy soil in mixed woods at Biloxi, Mississippi, September 13, 1904, Mrs. 

 F. S. Earle 182. 



Habitat: In dry pine woods or mixed woods. 

 Distribution: Alabama and Mississippi. 



24. Venenarius mexicanus Murrill, Mycologia 4: 332. 1912. 



Leucomyces mexicanus Murrill, Mycologia 3: 80. 1911. 

 Amanita mexicana Murrill, Mycologia 4: 332. 1912. 



Pileus convex, regular, 5 cm. broad; surface milk-white, smooth, dry, with satiny luster, 

 adorned with patches of the membranous volva, which are 2-3 mm. broad, thin, white, separ- 

 able; margin thin, entire, concolorous; context thin, white, odor distinct, pleasant; lamellae 

 white, remote from the stipe, arcuate, narrow, crowded; spores oblong, smooth, hyaline, 

 4-5 X 2 fi; stipe cylindric, equal, white, hollow, glabrous, 4.5 cm. long, 4 mm. thick, not swollen 

 at the base; annulus superior, membranous, ample, white, movable; volva white, circumscissile, 

 the basal portion small, collapsed, and scarcely noticeable. 



Type locality: Motzorongo, Mexico. 

 Habitat: Rich earth in a moist virgin forest. 

 Distribution: Known only from the type locality. 



