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Montana Field Guide

Montana Field Guides

Floating Pondweed - Potamogeton natans


Global Rank: G5
State Rank: SNR

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 6

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General Description
Rhizomatous. Stems terete, little branched. Submersed leaves linear, terete, 8–15 cm × ca. 1 mm; stipules 2–12 cm long, not sheathing. Floating leaves long-petiolate; blades elliptic to ovate, 3–9 cm long. Spikes 3–5 cm long, continuous. Tepals green, 1–2 mm long. Fruits 4–5 mm long, rounded on back with a curved beak ca. 1 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Present
 


Range Comments
Circumboreal south to most of U.S. (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 9

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density

Recency

 

(Observations spanning multiple months or years are excluded from time charts)



Habitat
Shallow to deep water of ponds, lakes, sloughs; valleys (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Floating Pondweed — Potamogeton natans.  Montana Field Guide.  .  Retrieved on , from