EPHEMERUM CRASSINERVIUM, (Schwægr.) Hampe.
Tab. 8.
Plantæ annuæ, minimæ, subacaules, gregariæ, in prothallio byssoideo persistente nidulantes.
Caulis brevissimus, crectus, simplex, congesto-foliosus, basi radiculosus.
Folia 10–12, c basi lanceolata subulata, flexuoso-erecta, rigidula, capsulam longo superantia, laxe elongato-rhomboideo-areolata, superne papillosa, apiceni versus costasque dorso plus minus grosse serrata vel irregulariter dentata; costa basi baud raro subevanida cum apice desinente.
Flores dioici: planta mascula gemmiformis, 3–5-phylla, ad feminei basin sessilis; antheridiis 2–3.
Capsula immersa, sphærica, mammillata, in pedicello brevissimo; calyptra dimidiato-mitriformis, basi parce lacera; columella fugacissima; sporis majusculis subrotundis papillosis.
Ephemerum crassinervium, Müll. Synop. Musc. 1, p. 33.
Phascum crassinervium, Schwægr. Suppl. t. 2; Sulliv. Musc. Alleghan. 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 runcinate-dentate. The typical form here figured is readily connected by intermediates with E. spinulosum, Br. & Sch.
TAB. 8.—Ephemerum crassinervium.
1. Plantæ naturali magnitudine.
2, 3, 4. Plantæ.
5, 6, 7, 8. Folia.
9. Folium aveolationem monstrans.
10. Capsula cum perigoniali.
11. Capsula calyptrata.
12. Capsula.
13. Eadem verticaliter secta.
14. Spora.
15, 16. Calyptræ.
17. Flos masculus.
18 Folium perigoniale.
19. Antheridia.
