210 THE NORTH AMERICAN SLIME-MOULDS 



ft Spirals even, regular . . .1.7". inconspicna 



** Elaters rough, spinescent . . 3. T. iowensis 



ii. Peridium olivaceous or yellow. 



* Elaters smooth . . . . . 4. T. varia 



iii. Peridium vitelline yellow, translucent . 9. T. pnlcJiella 

 b. Hypothallus distinct ; sporangia crowded; spores reticulate, banded, 

 or netted. 



i. Spore-bands pitted 6. T. persimilis 



ii. Spore-bands, narrow, plain . . -7- T. favoginea 

 iii. Spores covered by a delicate net . . 5. T. scabra 



B. Sporangia stipitate. 



a. Hypothallus distinct 8. T. -verrucosa 



b. Hypothallus none ; peridium checkered with pale reticulations. 



i. Brownish red or black . . . 10. T. botrytis 



ii. Olivaceous. 



* Elaters smooth . . . .11. T. subfusca 

 ** Elaters rough 12. T. erect a 



c. Peridium plain, shining 13. T. decipiens 



1. TRICHIA INCONSPICUA Rostafinski. 

 1875. Trichia inconspicna Rost., Man., p. 259. 



Sporangia gregarious or crowded, small, spherical, ellipsoidal 

 or arcuate, brown or reddish brown, sessile ; hypothallus none ; 

 capillitium dull, dark, ochraceous, the elaters long, slender, even, 

 about 3 /-i wide, the spirals three or four rather closely wound, 

 the apices attenuate, acute, sometimes turned to one side ; spore- 

 mass concolorous, spores pale ochraceous, minutely but distinctly 

 warted, 10-12 /^. 



One of the smallest of the Trichiae, not uncommon in the 

 Mississippi Valley on decaying fallen stems of Populns --sp. 

 Distinguished at sight from all except No. 3 following, by its 

 small size and brown color. Under the lens the long, delicate, 

 finely sculptured capillitial threads, with fine tapering points, 

 are distinctive. 



New England, New York, Pennsylvania, Illinois, Iowa, Mis- 

 souri, Nebraska ; Black Hills, South Dakota. 



2. TRICHIA CONTORTA (Ditmar) Rost. 



PLATE XIII., Figs. 7, 7 a. 

 1811. Lycogala contortum Ditmar, Sturm, Deutsch. Fl., III., Tab. 5. 



