The =pileus= becomes convex, and expanded or nearly flat, and often with an elevation or umbo in the center. It is thin, smooth, whitish and often tinged more or less deeply with yellow (sulfur or ochraceous) and is sometimes tinged with pink in the center. The flesh is whitish or tinged with pink. The =gills= when very young are whitish, then pink, and finally dark brown or blackish brown, much crowded, and distant from the stem. The =stem= is long, nearly cylindrical, whitish, abruptly enlarged below into a bulb. It is often yellowish below, and especially in drying becomes stained with yellow. The =ring= is thin, membranaceous, delicate, sometimes with broad, soft, floccose patches on the under side. The ring usually appears single, but sometimes the =veil= is seen to be double, and the outer or lower portion tends to split radially as in _A. arvensis_ or _A. placomyces_. This is well shown in large specimens, and especially as the veil is stretched over the gills as shown in Fig. 20. From the form of the plant as well as the peculiarities of the veil in the larger specimens, it is related to _A. arvensis_ and _A. placomyces_, more closely to the former. It occurs during mid-summer and early autumn. Figure 10 is from plants (No. 1986 C. U. herbarium) collected in open woods at Ithaca. [Illustration: FIGURE 21. FIGURE 22. PLATE 4.--Agaricus placomyces. Figure 21.--Upper view of cap, side view of stem. Figure 22.--Under view of plant showing radiately torn under side of the double veil. (3/4 natural size.) Copyright.] [Illustration: PLATE 5, FIGURE 23.--Agaricus placomyces. Three different views, see text for explanations. Dark scales on cap. (Natural size.) Copyright.] =Agaricus (Psalliota) subrufescens= Pk. =Edible.=--The _Agaricus subrufescens_ was described by Dr. Peck from specimens collected on a compost heap composed chiefly of leaves, at Glen Cove, Long Island. It occurs sometimes in greenhouses. In one case reported by Peck it appeared in soil prepared for forcing cucumbers in a greenhouse in Washington, D. C. According to the description the =pileus= becomes convex or broadly expanded, is covered with silky hairs and numerous minute scales. The color is whitish, grayish or dull reddish brown, the center being usually smooth and darker, while the flesh is white. The =gills= change from white to pinkish and blackish brown in age. The =stem= is long, nearly cylindrical or somewhat enlarged or bulbous at the base, first stuffed, then hollow, white. The =annulus= is thick, and the under side marked by loose threads or scales.