1873. _Trichamphora oblonga_ Berk. & C., _Grev._, II., p. 66. 1876. _Tilmadoche oblonga_ (Berk. & C.) Rost., _Mon. App._, p. 13. 1876. _Tilmadoche hians_ Rost., _Mon. App._, p 14. 1882. _Physarella mirabilis_ Peck, _Bull. Torr. Bot. Club_, IX., p. 61. 1893. _Physarella oblonga_ (Berk. & C.) Morg., _Jour. Cin. Soc._, p. 79. 1894. _Physarella mirabilis_ Peck, List., _Mycet._, p. 68. 1899. _Physarella oblonga_ (Berk. & C.) Morg., Macbr., _N. A. S._, p. 71. 1911. _Physarella oblonga_ Morg., List., _Mycet., 2nd ed._, p. 91. Sporangia scattered or gregarious, typically cup-shaped or sub-infundibuliform, stipitate, erect or cernuous, but varying through low salver-shaped cups, to irregular applanate and sessile masses, the peridium thin but firm, tawny, roughened by numerous yellowish calcareous scales, at length ruptured above and often reflexed in the form of petal-like segments from which project upwards the spiniform trabecules of the capillitium; stipe when present long, terete, red, arising from a scant hypothallus and extended within the sporangium to meet the tubular "columella"; capillitium of delicate violaceous threads seldom branched or united, radiating from the columella with few calcareous nodular expansions, but supported by stout yellow calcareous trabecules, running parallel to the capillitial threads, long adherent to the sporangial wall; spores smooth, globose violet-brown, 7-8 mu. Not uncommon in wet places. New York, Ohio, Iowa, South Dakota, Louisiana, Nicaragua; reported also from Ceylon, Java, etc. Not the least remarkable feature of this remarkable species is the variation in the form of the fruit or sporangia. We have specimens from Louisiana (Rev. Langlois) which show no trace of columella, the whole structure involute and plicate, short stipitate, recalling the extremest complexity of such a species as _P. polycephalum_. _Vid._ Pl. XVI., Fig. 6. Moreover, in these specimens the calcareous deposits are white and not yellow, giving the entire fructification a grayish aspect. Yet there is no doubt we have here simply an exaggerated abnormality of the species; the spores are identical in size, color, and surface. Plasmodium bright yellow. Dr. Peck gave to his forms the name _Physarella mirabilis_; but specimens sent by Michener of Pennsylvania, and by Berkeley and Curtis described as _Trichamphora oblonga_ (_Grev._, II., p. 66), are the same thing. _N. A. F._, 1212.