12. Comatricha rubens Lister.

Sporangia gregarious, globoid or ellipsoidal, 1–1.5 mm., pink-brown, stipitate; peridium persistent below; stipe .5–1 mm., black, shining; columella to more than half the sporangium, giving off on all sides the brownish-violaceous, flexuose threads of the capillitium, somewhat thickened and broadly attached to the persisting peridial cup; spores lilac-brown, spinulescent, 7–8 µ.

Another border species, looking to the lamprodermas. Philadelphia, by courtesy Mr. Bilgram.

13. Comatricha pulchella (Bab.) Rost.

[Plate XIII.], Fig. 4, and [Plate XII.], Figs. 16 and 16 a.

Sporangia very minute, 1 mm. high, scattered, ovate or ovate-cylindric acuminate, pale brown or ferruginous, stipitate; stipe short, black, nearly even; hypothallus none, or merely a circular base to the tiny stem; columella straight, gradually tapering, reaching almost if not quite to the apex of the sporangium; capillitium dense, a network of flexuous brown threads, rather broad within, ending in slender tips without; spore-mass brown, spores by transmitted light pale "lilac brown," or pale ferruginous, minutely but uniformly warted, 6–8 µ.

Probably widely distributed but rarely collected. Pennsylvania, Iowa; Okoboji. Toronto,—Miss Currie.

14. Comatricha ellisii Morg.