Nuphar variegata Durand
Common Name: YELLOW POND-LILY
Coefficient of Conservatism: 7
Coefficient of Wetness: -5
Wetness Index: OBL
Physiognomy: Nt P-Forb

Nuphar variegata M. R. Penskar

Lakes, ponds, quiet rivers and streams.

The most reliable character for distinguishing it from N. advena, especially for use with herbarium specimens, is the flattened (or even narrowly winged) petiole. The leaves (except for submersed basal ones) of N. variegata usually have the blades floating, with basal lobes ± parallel, the sinus narrow, parallel-sided, or closed (the lobes slightly overlapping). In N. advena, the blades are often erect, held above the water (the plant thus perhaps better adapted for emergence on drying shores), with basal lobes rather divergent, the sinus wide-angled (often as much as 60° or even more). In N. variegata the lobes are frequently divergent, and in N. advena they are more rarely overlapping. Leaf aspect is thus more helpful in the field, when other characters can be considered, than in the herbarium, where the round or 2-edged petiole shape seems most helpful.

Locations

Alcona County
Alger County
Allegan County
Alpena County
Antrim County
Baraga County
Barry County
Benzie County
Berrien County
Charlevoix County
    Including Beaver Island
Cheboygan County
Chippewa County
    Including Drummond Island
Clare County
Clinton County
Crawford County
Delta County
Emmet County
Gladwin County
Gogebic County
Grand Traverse County
Gratiot County
Hillsdale County
Houghton County
Huron County
Ingham County
Iosco County
Iron County
Isabella County
Kalamazoo County
Kalkaska County
Kent County
Keweenaw County
    Including Isle Royale
Lake County
Lapeer County
Leelanau County
    Including Manitou Islands
Lenawee County
Livingston County
Luce County
Mackinac County
    Including Bois Blanc, Mackinac, Round Islands
Manistee County
Marquette County
Mason County
Menominee County
Missaukee County
Monroe County
Montcalm County
Montmorency County
Muskegon County
Newaygo County
Oakland County
Ogemaw County
Ontonagon County
Osceola County
Oscoda County
Otsego County
Ottawa County
Presque Isle County
Roscommon County
Schoolcraft County
St. Clair County
St. Joseph County
Tuscola County
Van Buren County
Washtenaw County
Wayne County
Wexford County

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 15, 2017. http://www.michiganflora.net/species.aspx?id=1728.