=Spores= brownish-rust-color. The small bulb at the base is formed by the mycelium being rolled together. Stature variable. _Fries._ =Spores= dingy rust-color, elliptical, 10–12×4–5µ _Massee_. West Virginia, New Jersey, Pennsylvania, in grassy places, pastures and along pavements. Common. May to November. _McIlvaine._ In 1897 Fairmount Park, Philadelphia, abounded with N. pediades, which were collected and eaten by many. The caps are tender and of a mushroom flavor. =N. semi-orbicula´ris= Bull.—_semi_, half; _orbicularis_, round. (Plate LXXVIII, p. 294.) =Pileus= 1–2 in. broad, _tawny rust-color_ then ochraceous, slightly fleshy, convexo-expanded, obtuse, dry, even, smooth, corrugated when dry. =Stem= 3–4 in. long, scarcely beyond 1 line thick, cartilaginous, tough, slender, tense and straight, equal, even, smooth, becoming pallid _rust-color_, shining, often darker at the base, _internally containing a separate narrow tube_ which is easily broken up into fibrils. =Gills= adnate, rarely sinuate behind, almost 3 lines _broad_, and many times broader than the flesh of the pileus, crowded, _pallid then rust-color_. The pileus is slightly viscid when fresh and moist. Easily distinguished from S. semi-globatus, with which it has been confounded, by the stem. _Stevenson._ =Spores= 14×8µ _W.G.S._; 10×5–6µ _Massee_. Allied to N. pediades, distinguished by its viscid cap when moist, and dark stem. Common over the states. Washington, D.C., _Mrs. Mary Fuller_. West Virginia, Pennsylvania, North Carolina, New Jersey. Solitary, sometimes cespitose, very common on lawns, rich pastures, etc. April until frost. _McIlvaine._ This is one of our first appearing toadstools, coming up when the grass shows its full spring hue. It is found after rains until the coming of frost. Its hemispherical caps, precise, neat, dark gills and brown spores readily distinguish it. While usually small, patience and picking will soon gather quarts. The caps cook easily and are of excellent flavor. =N. platysper´ma= Pk.—_platys_, broad; _sperma_, seed. =Pileus= convex, becoming nearly plane, glabrous, slightly tinged with ochraceous or reddish-yellow when young, soon whitish, the margin at first adorned with vestiges of a white flocculent veil. =Flesh= white. =Lamellæ= moderately close, slightly rounded behind, pallid, becoming brownish. =Stem= equal, stuffed with a white pith, slightly flocculent or furfuraceous above when young, whitish, the mycelium sometimes forming white thread-like strands. =Spores= broadly elliptical, 15µ long, 12.5µ broad. =Pileus= 1–1.5 in. broad. =Stem= 3–5.5 in. long, 1.5–2 in. thick. On the ground. Compton, Cal. _Prof. A.J. McClatchie._ This species differs from N. pediades and N. semi-orbicularis, to which it is related, by its larger, broader spores and paler color. _Peck_, Bull. Torr. Bot. Club, Vol. 25, No. 6.