Mar., 18K7.] 
NORTH AMERICAN AGARICS. 
31 
II. Exannulati. Annulus obliterated or wholly wanting. 
E. Volva connate only with the base of the stipe, more or less 
of the upper free portion persistent. 
g. Volva dehiscent at the apex , persistent entire. 
20. Agaricus yolvatus, Peck. 33d X. Y. Rep., p. 47 ; Morgan, 
Flora M. V., No. 6. There are figures of this species in our herbarium. 
Pileus convex, then nearly plane, hairy or floccose-scaly ; the margin 
striate ; stipe stuffed, floccose-scaly ; volva large, firm, persistent, cup- 
sliaped ; lamellae close, free, white ; spores elliptic, .010 x .0075 millim. 
In moist woods, in spring and summer. New York, Peck ; Ohio. Pileus 
2—4 inches in diameter, stipe 3—7 inches long. The pileus is usually 
white, but the color varies to brownish, especially on the disk. This is 
an elegant species, well marked by the large, thick, elongated volva. 
21 Agaricus vaginatus, Bull. Fries, Hym. Eur., p. 27; Peck, 
33d N. Y. Rep., p. 47; Stevenson, B. F., Vol. I, p. 11; Cooke, .Illust. pi. 12. 
Pileus thin, campanulate, then explanate, nearly naked ; the margin 
membranaceous, pectin ate-sulcate; stipe hollow, attenuate, fragile, 
floccose-scaly; volva sheathing, lax ; lamellae free, white; spores globose, 
.008—.010 millim. in diameter. In woods everywhere ; common. Pileus 
2—4 inches in diameter, stipe 4—6 inches long. The color of the pileus 
varies from white through tawny to brownish ; there is usually a shade 
of brown, at least upon the disk. The stipe is not bulbous at the base ; 
the large, free volva will be found entire beneath the soil. 
h. Volva ruptured irregularly , the fragments of the upper part 
remaining as scales upon the pileus. 
22. Agaricus ag^Lutustatus, B. &. C. Hooker’s Journal of 
Botany, 1849, p. 97. # 
White; pileus hemispheric, then plane, viscid, areolate-scaly from 
the remains of the volva; the margin thin, sulcate; stipe short, solid, 
bulbous ; volva with a free margin ; lamellae broad, ventricose, rotund- 
ate-free; spores elliptic. In pine woods. South Carolina, Curtis. Pileus 
1—2 inches in diameter, the stipe 4—14 inches long and two lines thick. 
“Resembling some of the dwarf forms of A. vaginatus , but at once dis¬ 
tinguished by its solid stem and decidedly viscid, areolate-squamose 
pileus. 
23. Agaricus adnatus, Smith. Fries, Hym. Eur., p. 28; Steven¬ 
son, B. F., Yol. I, p. 12; Cooke, Illust. pi. 35. 
Pileus convex, then plane, pale buff-yellow ; the margin even ; stipe 
stuffed, then hollow, iibrillose; volva lax, ruptured irregularly into 
scales which adhere to the pileus; lamellae adnate, white; spores 
.010 x .008 millim. In woods. Minnesota, Johnson; California, Hark- 
ness. Pileus 2—3 inches in diameter, stipe 2—4 inches long. Volva 
connate half way with the base of the stipe; the free limb irregularly 
torn and most of it distributed as scales upon the pileus. 
F. Volva wholly adnate, circumscissle, the base marginate and 
persistent. 
