Serenoa S. repens (Bartr.) Small Thrinax T. microcarpa Sarg. T. parviflora Sw. Saw Palmetto Brittle Thatch Palm Thatch Palm Araceae Arum Family Arisaema A. dracontium (L.) Schott Muricauda Dracontium A. triphyllum (L.) Schott A. acuminatum, A. quinatum Colocasia C. esculenta (L.) Schott Orontium 0. aquaticum L. Peltandra P. sagittifolia (Michx.) Morong P. glauca P. virginica (L.) Schott & Endl. Pistia P. stratiotes L. Lemna L. L. L. L. L. L. L. Green Dragon Jack-in-the-pulpit Wild Taro Golden Club Spoon-flower Green Arum Water-lettuce Lemnaceae Duckweed Family Duckweeds gibba L. minor L. obscura (Austin) Daubs perpusilla Torr. L. minima trinervis (Austin) Small triscula L. valdiviana Phil. L. cyclostasa Spirodela S. oligorhiza (Kurz) Hegelm. S. polyrhiza (L.) Schleid. Common Duckweed Star Duckweed Greater Duckweed