been managed by hand-harvesting. Several organizations in the New England states have undertaken successful lake-wide hand-harvesting management programs. Periodic maintenance is necessary; the species cannot be completely eradicated once established, but it can be reduced to manageable levels. Well-trained divers with proper techniques have effectively controlled milfoil and maintained lakes, such as in the Adirondack Park in Northern New York where chemicals, mechanical harvesters, and other management techniques are banned as disruptive. The Adirondack Watershed Institute (AWI) of Paul Smiths College touts the effectiveness of hand-harvesting. Taxonomy A detailed molecular phylogenetic study enabled the construction of an infrageneric taxonomy but also revealed that another Haloragaceae genus, the monotypic Meziella Schindl., once thought to be extinct, was embedded within it, leading to its submersion within the former as Myriophyllum subgenus Meziella. This created three subgenera, further divided into sections and subsections: Subgenera (type) Myriophyllum (M. spicatum L.) Meziella (Schindl.) M.L.Moody & D.H.Les (M. trifidum (Nees) M.L.Moody & D.H.Les.) Brachytheca Schindl. (M. variifolium Hook.f.) List of selected species Myriophyllum alpinum Myriophyllum alterniflorum DC., 1815 Myriophyllum amphibium Myriophyllum aquaticum Myriophyllum artesium Myriophyllum austropygmaeum Myriophyllum axilliflorum Myriophyllum balladoniense Myriophyllum bonii Myriophyllum callitrichoides Myriophyllum caput-medusae Myriophyllum coronatum Myriophyllum costatum Myriophyllum crispatum Myriophyllum dicoccum Myriophyllum drummondii Myriophyllum decussatum Myriophyllum echinatum Myriophyllum exasperatum Myriophyllum farwellii Myriophyllum filiforme Myriophyllum glomeratum Myriophyllum gracile Myriophyllum heterophyllum Myriophyllum hippuroides Myriophyllum humile Myriophyllum implicatum Myriophyllum indicum Willd., 1805 Myriophyllum integrifolium Myriophyllum jacobsii Myriophyllum lapidicola Myriophyllum latifolium Myriophyllum laxum Myriophyllum limnophilum Myriophyllum lophatum Myriophyllum mattogrossense Myriophyllum mezianum Myriophyllum muelleri Myriophyllum muricatum Myriophyllum oguraense Myriophyllum oliganthum Myriophyllum petraeum Myriophyllum papillosum Myriophyllum pedunculatum Myriophyllum pinnatum Myriophyllum porcatum Myriophyllum propinquum Myriophyllum pygmaeum Myriophyllum quitense Myriophyllum robustum Myriophyllum salsugineum Myriophyllum siamense Myriophyllum sibiricum Myriophyllum simulans Myriophyllum spicatum Myriophyllum striatum Myriophyllum tenellum Myriophyllum tetrandrum Myriophyllum tillaeoides Myriophyllum trachycarpum Myriophyllum trifidum Myriophyllum triphyllum Myriophyllum tuberculatum Myriophyllum ussuriense Myriophyllum variifolium Myriophyllum verrucosum Myriophyllum verticillatum Myriophyllum votschii References Bibliography Freshwater plants Saxifragales genera