rCONKS MUSCORUM. 



EPHEMERUM CRASSINERVIUM, (Schwac/r.) Hampe. 



Tab. 8. 



Plants annus, minim®, subacaules, gregarise, in prothallio 

 byssoideo persistente nidulantes. 



Caults brevissimus, crectus, simplex, congesto-foliosus, basi 

 radiculosus. 



Folia 10-12, c basi lanceolata subulata, flexuoso-erecta, rigi- 

 dula, capsulam longo superantia, laxe elongato-rhomboideo-areo- 

 lata, superne papillosa, apiceni versus costasque dorso plus minus 

 grosse serrata vel irregulariter dentata ; costa basi baud raro 

 subevanida cum apicc desinente. 



Flores dioici : planta mascula gemmiformis, 3 - 5-pbylla, ad 

 feminei basin sessilis ; antheridiis 2-3. 



Capsula immersa, sphserica, mammillata, in pedicello brevissi- 

 mo ; calyptra dimidiato-mitriformis, basi parce lacera ; columella 

 fugacissima ; sporis majusculis subrotundis papillosis. 



Ephemerum crassinervium, Miill. Synop. Muse. 1, p. 33. 

 Phascum crassinervium, Schwsegr. Suppl. t. 2; Sulliv. Muse. Allegban. 

 No. 209, Mosses United States, p. 14. 



Hab. Moist clayey ground, roadsides, river-banks, &c. 



A very variable species : leaves more or less papillose on both 

 surfaces, their margins slightly serrate or spinulose and runci- 

 nate-dentate. The typical form here figured is readily connected 

 by intermediates with E. spinulosum, Br. & Sch. 



TAB. 8. — Ephemerum crassinervium. 



1. Plantse naturali magnUudine. 13. Eadem verticaliter seeta. 



2, 3, 4. Plants. 14. Spora. 



5, 6, 7, 8. Folia. 15, 16. Calyptrte. 



0. Folium aveolationem monstrans. 17. Flos masculus. 



10. Capsula cum perigoniali. 18 Folium perigoniale. 



11. Capsula ealvptrata. 19. Antheridia. 



12. Capsula. 



2 



