PteridoPortal - Osmundaceae

Osmundaceae
Morton Arboretum	FNA Resources R. David Whetstone T. A. Atkinson in Flora of North America (vol. 2) Plants terrestrial, herbaceous, frequently in clumps. Stems creeping, beset with old petiole bases and black fibrous roots; scales absent; older stems seldom persisting. Leaves monomorphic or dimorphic. Blades 1--2-pinnate (2-pinnatifid); rachises grooved. Pinnae monomorphic or dimorphic. Indument of reddish to light brown hairs. Veins dichotomous, running to margins. Sori absent; sporangia born on slightly modified fertile segments of blades also possessing fully expanded pinnae, or sporangia covering blades lacking green expanded pinnae, clustered in marginal zones, indusia lacking. Spores green, all alike. Gametophytes green, aboveground, obcordate to elongate. Osmundaceae are considered intermediate in several respects between eusporangiate and leptosporangiate ferns. In the absence of sori, simultaneous maturation of spores, and development of sporangia from several initial cells, they are much like eusporangiate ferns. Their large prothalli with projecting antheridia are similar to those of leptosporangiate ferns.
Species within checklist: Rare pteridophytes of New Jersey \|\| << 1 - 50 taxa >> Claytosmunda claytoniana Leptopteris alpina Leptopteris fraseri Leptopteris hymenophylloides Leptopteris intermedia Images not available Leptopteris laxa Leptopteris moorei Leptopteris superba Leptopteris wilkesiana Leptopteris x intermedia Images not available Osmunda abyssinica Osmunda herbacea Osmunda hilsenbergii Osmunda hybrida Images not available Osmunda japonica Osmunda lancea Osmunda regalis Osmunda x mildei Images not available Osmunda x ruggii Osmundastrum cinnamomeum Plenasium angustifolium Plenasium banksiifolium Plenasium javanicum Plenasium vachellii Todea antarctica Images not available Todea barbara Todea papuana † anomopteris mougeotii Images not available † baculatisporites comaumensis Images not available † baculatisporites kachaikensis Images not available † baculatisporites turbioensis Images not available † chinlea campii Images not available † gordonopteris lorigae Images not available † millerocaulis australis Images not available † osmunda affinis † osmunda delawarensis Images not available † osmunda dicksonioides Images not available † osmunda dubiosa Images not available † osmunda greenlandica Images not available † osmunda hollicki Images not available † osmunda macrophylla Images not available † osmunda major † osmunda montanensis Images not available † osmunda occidentale Images not available † osmunda oregonensis Images not available † osmunda sepulta Images not available † osmunda sphenopteroides Images not available † osmunda wehrii Images not available † osmundacaulis beardmorensis Images not available † osmundacaulis schemnitzensis