Sagittaria graminea Michx. - Grass-leaved Arrowhead


 

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Sagittaria graminea - (image 1 of 3)

 

Taxonomy

Family: Alismaceae

Habitat

Shallow water of ponds.

Associates

Eleocharis acicularis, Elodea canadensis, Ludwigia polycarpa, Najas flexilis, Nuphar advena, Nymphaea tuberosa, Polygonum coccineum, Pontederia cordata, Potamogeton foliosus, Potamogeton gramineus, Vallisneria americana.

Distribution

Newfoundland and southern Labrador west to MN and SD, south to Cuba and TX.

Morphology

Herbaceous, aquatic perennial from short rhizomes. Leaves erect and emersed or lax and submersed; emersed leaves nearly all linear to lance-ovate, rarely with 1 or 2 basal lobes. Flowers in 2-12 whorls on a scape 3-50 cm long; upper flowers staminate on slender, erect pedicels; lowers flowers pistillate on thicker pedicels mostly 1 cm or more long; petals white or pink, 1-2 cm. Achenes about 2 mm long, the beaks less than 0.8 mm long.

Notes

Flowers late May to early October

Wetland indicator: Obligate

 

References

Gleason, Henry A. and A. Cronquist. 1991. Manual of Vascular Plants of Northeastern United States and Adjacent Canada. Second Ed.

The New York Botanical Garden. Bronx, NY

 

Swink, F. and G. Wilhelm. 1994. Plants of the Chicago Region.
Indiana Academy of Science. The Morton Arboretum. Lisle, Illinois.

 


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 Michael Hough 2005