Aquatic

Wolffia columbiana Karst.
Columbia Water-meal

Habitat: Ponds and still waters. [Open water (non-forested, wetland)]

Sources:
http://www.maine.gov/dacf/mnap/features/wolcol.htm

Wolffia brasiliensis Weddell
Pointed Water-meal

Habitat: Mesotrophic to eutrophic waters of lakes, rivers, and backwaters. [Open water (non-forested, wetland)]

Sources:
http://www.maine.gov/dacf/mnap/features/wolbra.htm

Stuckenia filiformis (Pers.) Boerner
Northern Slender Pondweed

Habitat: Alkaline ponds and stream. [Open water (non-forested, wetland)]

Sources:
http://www.maine.gov/dacf/mnap/features/stufil.htm

Ranunculus gmelinii DC.
Small Yellow Water Crowfoot

Habitat: Springy rills, clear cold ponds, shores and meadows. [Open water (non-forested, wetland)]

Sources:
http://www.maine.gov/dacf/mnap/features/rangme.htm

Nymphaea leibergii Morong
Pygmy Water-lily

Habitat: Pond margins and swamps. [Open water (non-forested, wetland)]

Sources:
http://www.maine.gov/dacf/mnap/features/nymlei.htm

Nuphar advena (Ait.) Ait. f. in Ait. & Ait. f.
Yellow Pond-lily
http://www.maine.gov/dacf/mnap/features/nupadv.htm

Habitat: Slow-moving streams. [Open water (non-forested, wetland)]

Isoetes prototypus D.M. Britt.
Prototype Quillwort

Habitat: Shallow low nutrient ponds on sandy substrates. [Open water (non-forested, wetland)]

Sources:
http://www.maine.gov/dacf/mnap/features/isopro.htm

Isoetes acadiensis Kott
Acadian Quillwort

Habitat: Submersed in ponds or lakes, less often in rivers, rooted in gravel, sand, or mud, rarely amphibious [Open water (non-forested, wetland)].

Sources:
http://www.maine.gov/dacf/mnap/features/isoaca.htm

Heterantha dubia (Jacq.) MacM.
Water Stargrass

Habitat: Damp sands, often submerged in quiet waters. [Open water (non-forested, wetland)]
http://www.maine.gov/dacf/mnap/features/hetdub.html

Glyceria acutiflora Torr.
Sharp-scaled Manna-grass

Habitat: Shallow water or very wet soil. [Open wetland, not coastal nor rivershore (non-forested, wetland)]

Sources:
http://www.maine.gov/dacf/mnap/features/glyacu.htm

Potamogeton strictifolius Benn.
Straight-Leaved Pondweed

Habitat: Calcareous waters [Open water (non-forested, wetland)]

Sources:
http://www.maine.gov/dacf/mnap/features/potstr.htm

Potamogeton friesii Rupr.
Fries’ Pondweed

Habitat: Calcareous or brackish waters. [Open water (non-forested, wetland)]

Sources:
http://www.maine.gov/dacf/mnap/features/potfri.htm

Potamogeton pulcher Tuckerman
Spotted Pondweed

Habitat: Peaty or muddy acid waters or shores. [Open water (non-forested, wetland)]

Sources:
http://www.maine.gov/dacf/mnap/features/potpul.htm

Potamogeton vaseyi J.W. Robbins
Vasey’s Pondweed

Habitat: Quiet muddy or calcareous waters. [Open water (non-forested, wetland)]

Sources:
http://www.maine.gov/dacf/mnap/features/potvas.htm

Ranunculus ambigens S. Wats.
Water-plantain Spearwort

Habitat: Sloughs, ditches, and muddy swamps. [Open water (non-forested, wetland)]

Sources:
http://www.maine.gov/dacf/mnap/features/ranamb.htm

Sagittaria rigida Pursh
Stiff Arrowhead

Habitat: Calcareous or brackish mud or water. [Tidal wetland (non-forested, wetland)]

Sources:
http://www.maine.gov/dacf/mnap/features/sagrig.htm

Sagittaria filiformis J.G. Sm.
Narrow-leaved Arrowhead

Habitat: Shallow, swift waters or deep streams [Open water (non-forested, wetland)]

Sources:
http://www.maine.gov/dacf/mnap/features/sagfil.htm