ICONKS MUSCORUM. 36 



FISSIDENS OBTUSIFOLIUS, WiU 



Tab. 22. 



Plants humiles, densius gregarise, vel caespitulos laxiusculos 

 efformantes, pallide virides. 



Caulis 3 - 6-linearis, simplex vel e basi divisus, erectus vel de- 

 clinatus. 



Folia 6-12-juga, expansa vel secunda, inferne minora obo- 

 vata, superne majora oblonga, obtusa, laxiusculc pellucide areo- 

 lata, cellulis angulato-rotundis ; lamina apicali dimidiam vel 

 tertiam duplicaturas partem aequante, dorsali ad basin sensim 

 evanida ; costa sub apice desinente. 



Flores dioici terminales : masculi diphylli ; antberidiis 4-6 

 paraphysatis ; perigonialibus lamina sola apicali instructis. 



Capsula oblongo-ovalis vel fere obovata, macrostoma, pachyder- 

 ma ; peristomii dentibus breviusculis basi aurantiaceis, cruribus 

 hyalino-albidis granulosis; annulo angustissimo persistente ; oper- 

 culo hemisphgerico apiculato ; calyptra dimidiata ; sporis magnis. 



Fissidens obtusifolius, Wils. in Lond. Jour. Bot. 1845, p. 196, t. 9; 

 Sulliv. Muse. Alleghan. No. 181 ; Mosses U. States, p. 24; Sulliv. & Lesqx. 

 Muse. Bor.-Amer. Exsicc. (ed. 1), No. 78. 



Hab. Ledges of wet dripping rocks, Bank Lick, near Cincin- 

 nati, Lea. Moist rocks, Clifton, Ohio. 



Easily recognized by its obtuse leaves and short operculum. 



TAB. 22. — Fissidens obtusifolius. 



1. Plantae naturali nag niiudine. 11, 12, 13. Capsular 



2. Planta fertilis. 14. Sectio verticalis capsular 



3. Planta mascula. 15. Pars peristomii. 



4. 5. Folia perichaet. cum archegoniis. 16. Eadem verticaliter secta. 



6. Folium caulinum. 17. Spora?. 



7, 8. Areolatio ejusdem. 18. Operculum. 

 9. Sectiones transversales folii. 19. Calyptra. 



10. Sectio trans, folii et caulis. 



