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Blewits, not by accident, but consistently. Herein, then, we have one valuable guide in the discrimination of species. Furthermore, the base of the stem, in a few instances, is enclosed in a sheath, or volva, which may be comparatively loose and distinct, as in the Buff Warty Caps, or it may be closely adherent, showing only a circular line or ring, as in the Ruddy Warty Caps and the Fly Agaric. This, again, is peculiar only to certain species and should be borne in mind. Regarding the stem, it is often desirable, when the name of a species must be determined, to cut the stem lengthwise down the middle; by this means, it will be found that in some species the stem is hollow in the center, while in others it is solid. All these are points that should be remembered by those who have no desire to poison themselves.
One other point is of equal importance to, if not greater than, any which we have