FONTINALIS BIFORMIS, Sulliv.
Tab. 59, 60.
Plantæ fluitantes, sola basi ima radicantes, juniores e viridi lutescentes, seniores luride virides.
Caulis pedalis et longior, tenuis, flexilis, ramosissimus, ramis ramulisque flexuosis elongatis.
Folia laxe incumbentia, indistincte trifaria, dimorpha; vernalia ampla mollia late ovato-lanceolata concava acuta vel obtusiuscula, aestivalia (illis delapsis) multo minora angustiora convolutacea rigida ramulos novellos vestientia; areolatione media foliorum vernalium lineari, apicali latiore breviore rhombea sphagniformi, basilari ad parvas auriculas decurrentes multo majore quadrato-oblonga.
Flores dioici; femineis rarissimis ad caulis basin positis; masculis longius stipitatis.
Capsula oblongo-ovalis vel subcylindrica, perichætialibus apice ætate erosis arete circumvestita, pachyderma; perist. dentibus lineali-lanceolatis, 18–20-articulatis, ciliis solo apice tessellatim conjunctis ceterum liberis appendiculatis, utrisque granuloso-papillosis; operculo conico-rostrato; calyptra elongato-conica basi lacera.
Fontinalis biformis, Sulliv. Mosses U. States, p. 54 ; Sulliv. & Lesqx. Musc. Bor.-Amer. Exsicc. (ed. 1), No. 226b and 226c.
Forma vernalis.—F. disticha var., Musc. Alleghan. No. 191; Pilotrichum sphagnifolium, C. Müll. Synop. 2, p. 150.
Forma æstivalis.—F. disticha var., Musc. Alleghan. No. 192; Pilotrichum distichum, C. Müll. Synop. Muse. 2, p. 150, ex parte.
Hab. Woodland rivulets, Columbus, Ohio.
Besides other characters less striking, such as the rostrate operculum and the long-stipitate male flower, the prominent
