The episporic characters of this species ally it to _T. persimilis_ most nearly. The reticulations are possibly not more divergent from the typical form of that species than are the same features in some other forms there included. But in the present case, added to the episporic sculpture, we must reckon the peculiar capillitial thread, unlike that seen in either of the chrysospermatous forms, and the gregarious habit without hypothallus. These peculiarities seemed to Dr. Rex distinctive, and as they appear constant they may be left to separate the species. 10. TRICHIA BOTRYTIS _Persoon._ PLATE XIII., Figs. 8, 8 _a_. 1791. _Stemonitis botrytis_ Pers., Gmel., _Syst. Nat._, II., 1468. 1794. _Trichia botrytis_ Pers., _Roem. N. Mag. Bot._, I., p. 89. 1803. _Sphaerocarpus fragilis_ Sowerby, _Eng. Fung._, I., p. 279. 1829. _Trichia pyriformis_ Fries, _Syst. Myc._, III., p. 184. 1875. _Trichia fragilis_ (Sow.) Rost., _Mon._, p. 246. Sporangia gregarious, scattered, sometimes combined in clusters, pyriform or turbinate, stipitate, red-purple or, ochraceous-brown the peridium breaking up irregularly, the dehiscence sometimes prefigured by pale reticulations on the surface; stipe solid, single, or united in clusters of five or more together, dark-colored, red or purple-brown, opaque; capillitium orange, ochraceous yellow, or even reddish brown, the threads simple or rarely branched, long-fusiform, about 4 mu thick at the centre, tapering gradually to the long accuminate, apiculate tips, spirals three or four, even, smooth, rather closely wound and traceable almost to the apex; spores concolorous in mass, under the lens pale, globose, more or less closely minutely warted but not reticulate, 10-12 mu. A species remarkable for its variations in color. More commonly the unopened sporangia are opaque brown, by reason of a dense outer wall, and more frequently simple, or if compound, show but two or three united. The reddish variety, vinous or scarlet-black in color, is remarkably fasciate. Some clusters show twenty or more stipitate, globose sporangia, conjoined by their distinct but coherent stems. In such fruitings the sporangia are small, .5 mm. In the brown sporangia the dehiscence, as stated, is often definitely prefigured; in the multiple, red, obscurely, if at all. As presented in collections from the eastern United States, the two forms might well be disjoined. Persoon, however, discussed both together and so they remain. Saccardo includes _Craterium floriforme_ Schw. here.