PteridoPortal - Salviniaceae

Salviniaceae
Leslie Landrum	FNA Resources Clifton E. Nauman in Flora of North America (vol. 2) Plants small, floating aquatics. Stems creeping, branched, bearing hairs but no true roots. Leaves in whorls of 3, with 2 leaves green, sessile or short-petioled, flat, entire, and floating, 1 leaf finely dissected, petiolate, rootlike, and pendent. Submerged leaves bearing sori that are surrounded by basifixed membranous indusia (sporocarps); sporocarps of 2 types, bearing either megasporangia that are few in number (ca. 10), each with single megaspore, or many microsporangia, each with 64 microspores. Spores of 2 kinds and sizes, both globose, trilete. Megagametophytes and microgametophytes protruding through sporangium wall; megagametophytes floating on water surface with archegonia directed downward; microgametophytes remaining fixed to sporangium wall.
Azolla caroliniana Azolla filiculoides Azolla mexicana Azolla microphylla Azolla nilotica Azolla pinnata Azolla rubra Salvinia auriculata Salvinia biloba Salvinia cucullata Salvinia hastata Salvinia laevigata Images not available Salvinia martynii Salvinia minima Salvinia molesta Salvinia natans Salvinia nuriana Images not available Salvinia nymphellula Salvinia oblongifolia Salvinia sprucei Salvinia x molesta Images not available † ariadnaesporites cristatus Images not available † ariadnaesporites spinocaperatus Images not available † azolla berryi † azolla primaeva † azolla prisca Images not available † azolla schopfii Images not available † azolla stanleyi Images not available † azolla tertiaria Images not available † azolla vellus Images not available † azollopsis intermedia Images not available † azollopsis tormentosa Images not available † salvinia coahuilensis Images not available † salvinia cyclophylla Images not available † salvinia ehrhardti Images not available † salvinia elliptica † salvinia graui Images not available † salvinia intertrappea Images not available † salvinia preauriculata † salvinia spinulosa Images not available