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9. AGARICUS UMBROSUS Shady Agaric.

Difference.

Ag. with a submembranous thin as a membrane, rather flat, rugose wrinkled, minutely scaly, umber-colored pileus; crowded, very broad, pink, free lamellae; and a solid, whitish stipe.

Location.

It grows here and there on the ground in shady places within beech forests.

Description.

The stipe is 3 inches long, 2–3 lines approx. 4–6 mm thick, gradually broader downward, solid, minutely scaly, somewhat concolorous with the pileus, whitish at the apex.

The lamellae are 3 lines wide, convex, dirty white at first, finally flesh-colored, fimbriate fringed under a lens at the margin and concolorous with the pileus, thin, flaccid.

The pileus is 2 inches wide, thin in substance, the surface is rugose-lacunose wrinkled and pitted and covered with minute, dense scales, the margin is hairy, and the taste is somewhat nauseating.

Observation.

Regarding its size, it varies in the pileus being more or less hairy and the stipe being punctate dotted or minutely scaly; with the following species, it constitutes a certain natural family, yet they are entirely distinct from one another, as will become clear from the specific differences annexed here for the sake of clarity.

Agaricus villosus Hairy Agaric: with a subfleshy, convex-flat, granular-tomentose, blackish-bay pileus; pinkish-cinnamon lamellae which are finally free; and a hollow, glabrous, somewhat livid stipe. — Agaricus villosus BULL. CHAMP. T. 214?

Agaricus pluteus Shelf Agaric: with a subfleshy, umbonate bossed, blackish-livid pileus; free lamellae which are white at first then pink; and a solid, white stipe with blackish striae streaks. — Agaricus pluteus BATSCH. ELENCH. FUNG. Batsch, Elenchus Fungorum 1. P. 79. Ag. atrica-