All American species of Amanitopsis are given. Several have not been tested by the writer because of lack of opportunity.
Grouped by F.D. Briscoe—Studies by C. McIlvaine. Plate X.
| Fig. | Page. | Fig. | Page. |
| 1. Amanitopsis vaginata, | [28] | 5. Mycena galericulata, | [127] |
| 2. Amanitopsis vaginata, var. livida, | [29] | 6. Mycena prolifera, | [126] |
| 3. Amanitopsis nivalis, | [29] | 7. Mycena prolifera (section), | [126] |
| 4. Amanitopsis strangulata, | [30] |
A. vagina´ta Roze—vagina, a sheath. (Plate [X], figs. 1, 2, p: 28.) Pileus thin, fragile, glossy, smooth except in rare instances where a few fragments of the volva adhere to it for a time, deeply and distinctly striate on the margin, sometimes umbonate. Flesh white, in the dark forms grayish under the skin. Stem ringless, sometimes smooth, but generally mealy or floccose, hollow or stuffed with a cottony pith, not bulbous. Volva long, thin, fragile, closely sheathing yet free from the stem, except in the lower part, easily detachable and frequently remaining in the ground when the plant is pulled. Color variable, generally mouse-gray, sometimes livid, tawny-yellow or white, in one variety a rich date-brown. Spores globose, 8–10µ broad Peck; elliptical 10×7–8µ Massee.
Var. liv´ida Pers.—livid. Leaden brown, gills dingy. (Plate [X], fig. 2, p. 28.)
Var. ful´va Schæff.—yellowish. Tawny-yellow or pale ochraceous.
This plant is widely dispersed, having been reported from many localities in the United States, also from Nova Scotia and Greenland.
On ground in woods and on margins of woods, under trees, in shaded grassy places. Sometimes in open stubble and pastures. June to frost. Mt. Gretna, September, 1899, found a cluster on decayed chestnut stump. Various colors abound—hazel, brown, gray, yellow, whitish. The caps and stems are tender as asparagus tips, but without much distinct flavor when cooked.
Great care must be taken to distinguish these forms from Amanita spreta Pk. which is poisonous. See heading of genus—[Amanitopsis].