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Montana Field Guide

Montana Field Guides

Curly Pondweed - Potamogeton crispus

Noxious Weed: Priority 2B
Aquatic Invasive Species
Exotic Species (not native to Montana)

Global Rank: G5
State Rank: SNA

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 0

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General Description
Plants producing turions. Stems flattened, branched. Submersed leaves linear-oblong with serrate, wavy margins, sessile with a clasping base, 3–8 cm × 4–10 mm; stipules 3–7 mm long, shredding early. Floating leaves absent. Spikes 1–2 cm long, continuous. Tepals yellowish, ca. 1 mm long. Fruits 5–6 mm long, keeled with a straight beak (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Present
 


Range Comments
Introduced throughout most of N. America; native to Europe (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 57

(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, fresh or saline water of ponds, lakes, slow streams; plains, valleys (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX)

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