_Bot. Char._ _Pileus_ rather fleshy, at first hemispherical, then obtusely convex, and, when fully expanded, more or less excavated towards the centre. The margins at first even, at length tuberculo-sulcate, that is, marked with lines similar to those left on the skin after cupping. The epidermis dry in dry weather, but very sticky in moist, of various hues, tawny-purple, olive-green, ochraceous-yellow, or several of these united, and generally darkest at the centre; peeling off readily without laceration of the flesh. The flesh white, when cut slightly rufescent, when dry cream-coloured. The _gills_ fragile, cream-coloured, connected below by transverse plaits or veins, thick and broad, but tapering away towards the stalk, really simple, though a few imperfect gills interposed between the entire ones, and attaching themselves to their sides give these sometimes the appearance of being forked; the _stalk_ equal, white, or blotched here and there with purple stains, stuffed, brittle, and Vittadini adds, “long,” which is not my experience of it; when young it is so short as to be entirely hid by the globose head of the unexpanded pileus. The flesh inconsiderable but compact; _sporules_ pale-buff. The _Ag. ruber_, the _Colombo rossa_ of the Tuscans, and _Rother Täubling_ of Schœffer, is a complete _wood_-pigeon in its haunts; it grows very abundantly, may be gathered from July to a very late period in the autumn, and is as delicate and light of digestion as the _Russula_ last described. It may be readily distinguished from _Ag. alutaceus_ by the different colour of its gills and spores, which in that species are buff, but in the _Ag. ruber_ cream-coloured: moreover the greater thickness of the substance of the pileus of _Ag. alutaceus_, the margin of which is deeply sulcate, even at an early period of its development, and the pungent acrid taste, which is seldom wanting, are further means of distinguishing it from _Ag. ruber_. _Ag. emeticus_ differs from it in having unequal snow-white gills, and in extreme acrimony of taste. _Agaricus virescens_, Schœff.: the Verdette? _Ag. bifidus_, Bull. _Russula æruginosa_, Persoon. “La carne di questo Agarico è tenera e di sapore gratissimo.”—_Vitt._