Sporangia globose or obovoid or irregularly spherical, shining, golden yellow to tawny, anon iridescent with metallic lustre, sessile; hypothallus thin, but usually very distinct; capillitial mass ochraceous or tawny yellow, the elaters long, even, about 4 mu wide, the spirals four, more or less spinulose, generally joined by longitudinal ridges, the apices short, tapering regularly, anon bifurcate; spore-mass concolorous, spores by transmitted light bright yellow, marked by an irregular or fragmentary banded reticulation, the bands broad, flat, and pitted, 10-12 mu. Plasmodium said to be white. This species, common throughout the northern world, is distinguished from its congener, the following, not only by the episporic character, but generally by its different peridium and more sombre colors. It never shows at maturity the brilliant golden yellow fluff that hangs in masses about the open and empty vases of _T. favoginea_, a fact not unnoted by Batsch, and rendering his figure and description so far determinable. The episporic network shows all degrees of perfection or imperfection, and the elater also varies somewhat both in the apices and distinctness of longitudinal striae. The several synonyms listed seem to have taken origin in a recognition of some of the more pronounced variations. In any event the American form _T. abrupta_ Cke., with bifid apices, belongs here, and European specimens seem to show the identity of forms described by Karsten and De Bary. Not rare. New England, Canada, New York, Pennsylvania, Ohio, Alabama, Missouri, and west. 7. TRICHIA FAVOGINEA (_Batsch_) _Pers._ PLATE IV., Figs. 5, 5 _a_, 5 _b_. 1786. _Lycoperdon favogineum_ Batsch, _Elench. Fung._, p. 257, Fig 173, _a_, _b_. 1791. _Sphaerocarpus chrysospermus_ Bull., _Cham. de Fr._, Tab. 417, Fig. 4. 1794. _Trichia favoginea_ (Batsch) Pers., _Roem. N. Mag. Bot._, I., p. 90. 1875. _Trichia chrysosperma_ (Bull.) Rost., _Mon._, p. 255. Sporangia closely crowded, cylindric or prismatic by mutual pressure, obovoid, sessile, olivaceous yellow, smooth and shining; the peridium thin, opening above somewhat stellately, persistent; capillitium golden yellow, escaping entirely from the peridia, and forming woolly masses above them, the threads long, even, beautifully sculptured, bearing spirals about four, usually smooth and connected by light longitudinal ridges, the apices short tapering, about equal to the width of the elater, 6-7 mu; spores concolorous, by transmitted light paler, but still bright yellow, the episporic net conspicuous, the bands narrow and high, not pitted nor fragmentary, in form irregularly globose, 12-14 mu. Plasmodium yellow.