TRICHIA.] TRIOHIACEiB. ^ 163 



Genus 33.— TRICHIA Ualler, Hist. Stirp. Helv., iii., p. 114 

 (1768). Sporangia stalked or sessile; sporangium- wall mem- 

 branous, sometimes charged with granular matter; capillitium 

 yellow or brown, consisting of free elastic threads, pointed at 

 each end, and thickened with two to five spiral bands ; spores 

 reticulated, or minutely warted. 



KEY TO THE SPECIES OP TRIG HI A. 



A. Spores reticulated, or marked with broken bands: — 



Elaters 7 to 8 /a wide, spores reticulated, border 2 /x wide. 



1. T.favogi/nea 



Elaters 4 to 5 /* wide, spores reticulated with narrow bands, 

 border 1 ft. wide, sporangia stalked. 2. T'. verrucosa 



Elaters 4 to 6 /t wide, spores reticulated with broad pitted 

 bands, border 0' 5 to 1 /a wide, sporangia sessile. 



3. T. affimis ^ 

 Elaters 4 to 6 /a wide, spores with broken reticulation of 

 broad pitted bands, border 0'5 /«, wide, sporangia sessile. 



4. T. persimilis 



Elaters 4 to 6 /«. wide, spores very closely reticulated, border 



none, sporangia sessile. 5. T. scabra 



B. Spores minutely warted : — 



A. Spirals of elaters two. 6. T. varia 



B. Spirals of elaters three or more — 



a. Elaters shortly tapering at the ends — 



Sporangia sessile, wall uniformly thickened with 

 granular matter ; elaters smooth or spinulose. 



7. T. contorta ' 



Sporangia stalked, wall membranous, with rounded 

 areas thickened with granular deposits ; elaters 

 spinose. 8. T. erecta 



b. Elaters smooth, very gradually tapering at the ends — 



Stalk hollow, filled with spore-Hke cells. 



9. T. fallax 

 Stalk solid. 10. T. BoPrytis 



1. T. favoginea Pers., in Rbm., N. Mag. Bot., i., p. 90 (1794). 

 Plasmodium? Sporangia globose, ovoid, or clavate, crowded, 

 sessile or shortly stalked, on a membranous hypothallus ; 0*6 

 to 0-7 mm. broad, 0-7 to 1"9 mm. high, ochraceous-yellow ; 

 mass of spores and capillitium orange-yellow ; sporangium- wall 

 membranous, minutely thickened with irregular striae. Stalk 

 membranous, rarely present. Capillitium of long cylindrical 

 elaters 7 to 8 /a diam., smooth or with scattered spines, thickened 



