FISSIDENS OBTUSIFOLIUS, Wils.
Tab. 22.
Plantæ humiles, densius gregariæ, vel cæspitulos laxiusculos efformantes, pallide virides.
Caulis 3–6-linearis, simplex vel e basi divisus, erectus vel declinatus.
Folia 6–12-juga, expansa vel secunda, inferne minora obovata, superne majora oblonga, obtusa, laxiusculc pellucide areolata, cellulis angulato-rotundis; lamina apicali dimidiam vel tertiam duplicaturas partem æquante, 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, pachyderma; peristomii dentibus breviusculis basi aurantiaceis, cruribus hyalino-albidis granulosis; annulo angustissimo persistente; operculo hemisphærico apiculato; calyptra dimidiata; sporis magnis.
Fissidens obtusifolius, Wils. in Lond. Jour. Bot. 1845, p. 196, t. 9; Sulliv. Musc. Alleghan. No. 181; Mosses U. States, p. 24; Sulliv. & Lesqx. Musc. Bor.-Amer. Exsicc. (ed. 1), No. 78.
Hab. Ledges of wet dripping rocks, Bank Lick, near Cincinnati, Lea. Moist rocks, Clifton, Ohio.
Easily recognized by its obtuse leaves and short operculum.
TAB. 22.—Fissidens obtusifolius.
1. Plantæ naturali magnitudine.
2. Planta fertilis.
3. Planta mascula.
4. 5. Folia perichæt. cum archegoniis.
6. Folium caulinum.
7, 8. Areolatio ejusdem.
9. Sectiones transversales folii.
10. Sectio trans, folii et caulis.
11, 12, 13. Capsulæ
14. Sectio verticalis capsular
15. Pars peristomii.
16. Eadem verticaliter secta.
17. Sporæ.
18. Operculum.
19. Calyptra.
