2024 Edition • Get the App • Cite this Page
X

Colors

Data mode

Account

Login
Sign up

Collapse this

Support the Flora of the Southeastern US

2024 has been a banner year for making the best flora we can imagine. We've created:
With financial support from people like you, we are aiming even higher in 2025. Together we can accomplish all this: Vote on our 2025 priorities
  • Add Global Conservation Ranks (GRanks) vote
  • Professional graphic keys (polyclaves) to individual families/genera vote
  • 2 new FloraQuest apps: Florida & Mid-South vote
  • Image overlays highlighting diagnostic characters with arrows vote
  • iNaturalist integration in FloraQuest vote
Write-in vote: vote
We've set a goal of recruiting 200 ongoing supporters to donate $15 or more each month in 2025. Please help us reach this goal and make next year's flora even better:
Donate $15 per month
(0.06¢/key line)
Donate $30 per month
(0.13¢/key line)
Donate $50 per month
(amazing!)
Donate another
or one-time amount
Copy permalink to share

Sagittaria filiformis J.G. Smith. clade: Graminea Group, Platyphylla Complex. Threadleaf Arrowhead. Phen: May-Sep. Hab: Swiftly flowing water of blackwater rivers and streams, blackwater lake shores, tidal waters. Dist: As conceived here, probably ranging from MA south to s. FL, s. AL, and s. MS.

ID notes: The forms growing in swiftly flowing black water are remarkable and unlikely to be recognized as a Sagittaria unless in flower, with linear leaves over 100 cm long and only 1-3 mm wide, with 5-7 parallel ribbed veins, resembling S. kurziana.

Origin/Endemic status: Native

Taxonomy Comments: The proper taxonomic treatment and associated nomenclature to apply to these plants has been uncertain and controversial (see synonymy).

Synonymy ⓘ: = AqW, FNA22, K1, K3, NE, NY, Pa, Va, WH3, Keener (2005); = n/a – Tat; = Sagittaria stagnorum Small – GW1; = Sagittaria subulata (L.) Buchenau var. gracillima (S.Watson) J.G.Sm. – F, G, RAB, Bogin (1955); > Sagittaria filiformis J.G.Sm. – S; >< Sagittaria kurziana Glück – SFla; > Sagittaria lorata Chapm. – S, S13; > Sagittaria stagnorum Small – S, SFla; < Sagittaria subulata (L.) Buchenau – C

Links to other floras: = Sagittaria filiformis - FNA22

Show in key(s)

Show parent genus

Wetland Indicator Status:

  • Atlantic and Gulf Coastal Plain: OBL
  • Eastern Mountains and Piedmont: OBL
  • Northcentral & Northeast: OBL

Heliophily ⓘ: 8

Your browser does not support SVGs

Hover over a shape, letter, icon, or arrow on the map for definition or see the legend.

image of plant© Siddarth Machado, some rights reserved (CC BY), uploaded by Siddarth Machado source CC-BY | Original Image ⭷
image of plant© mfeaver, some rights reserved (CC BY), uploaded by mfeaver source CC-BY | Original Image ⭷

Feedback

See something wrong or missing on about Sagittaria filiformis? Let us know here: (Please include your name and email if at all complicated so we can clarify if needed.) We greatly appreciate feedback, and will include updates from you in our next webapp update, which can take a few months.