''Sagittaria filiformis'', the threadleaf arrowhead, is an aquatic plant species native to the eastern
United States
The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territori ...
, from
Maine
Maine () is a state in the New England and Northeastern regions of the United States. It borders New Hampshire to the west, the Gulf of Maine to the southeast, and the Canadian provinces of New Brunswick and Quebec to the northeast and ...
south to
Florida
Florida is a state located in the Southeastern region of the United States. Florida is bordered to the west by the Gulf of Mexico, to the northwest by Alabama, to the north by Georgia, to the east by the Bahamas and Atlantic Ocean, and to ...
and
Alabama
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, anthem = "Alabama"
, image_map = Alabama in United States.svg
, seat = Montgomery
, LargestCity = Huntsville
, LargestCounty = Baldwin County
, LargestMetro = Greater Birmingham
, area_total_km2 = 135,765 ...
. it occurs in flowing streams in the northern part of its range, but more stagnant waters such as marshes and swamps in the South.
''Sagittaria filiformis'' is a perennial herb up to 170 cm tall. Some leaves are thread-like, entirely underwater, but others are narrowly ovate or lanceolate and floating on the surface.
[Smith, Jared Gage. 1894. North American Species of ''Sagittaria'' and ''Lophotocarpus'' 20, pl. 15, figs 5-8, ''Sagittaria filiformis'']
References
External links
photo of herbarium specimen at Missouri Botanical Garden, holotype of ''Sagittaria filiformis'', collected in Alabamaphoto of herbarium specimen at Missouri Botanical Garden, ''Sagittaria filiformis'', collected in FloridaCenter for Aquatic and Invasive Plants, University of FloridaGo Botany, New England Wildflower Society
{{Taxonbar, from=Q15572318
filiformis
Flora of the Eastern United States
Freshwater plants
Plants described in 1894