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Rh TETRAPLODON AUSTRALIS, Sulliv. & Lesqx. Tab. 58.

teneræ, graciles, tomento radiculoso intertextæ, in cæspitulis compactis superne læte viridibus inferne fuscescentibus congestæ.

uncialis, brevior vel longior, simplex vel parce fastigiato-ramosus.

mollia, dissita, erectiuscula, elongato-lanceolata, longe tenui-acuminata, remote grosse serrato-dentata, interdum fere pinnatifida, rarius subintegra; costa cum apice desinente; reti laxissimo oblongo-hexagono.

dioici et monoici: flos masculus discoideo-capituliformis, conspicuus, in planta distincta graciliore terminalis, vel gemmseformis in plantae fertilis foliorum axillis ; floris terminalis perigonialibus 4–6, e basi late ovata erecta repente lineali-attenuatis subliorizontalibus; antheridiis et paraphysibus sub-clavæformibus, numerosissimis.

oblongo-ovalis, parvula, apophysi sporangio paululum latiore et longiore in pedicellum 3–5-linearem crassum sensim defluente instructa, laxius areolata, cellulis orificii marginalibus subquadrato-rotundis nee (ut in T. angustato) transversim oblongis; peristoma dentibus binatim conjunctis haud demisse insertis; calyptra elongato-conica, basi baud fissa, operculum hemisphærico-conicum obtuse apiculatum vix tegente.

Swamps near the sea-coast, Florida to New Jersey.