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Montana Field Guide

Montana Field Guides

Northern Pondweed - Potamogeton alpinus


Global Rank: G5
State Rank: SNR

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 7

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General Description
Stems terete, little branched. Submersed leaves linear-lanceolate, 4–12 cm × 5–12 mm; stipules 15–35 mm long, not closely sheathing. Floating leaves (often lacking) short-petiolate; blades oblanceolate to narrowly elliptic, reddish, 4–7 cm long. Spikes to 13 cm long, continuous. Tepals green Shallow, fresh or alkaline water of ponds, lakes; valleys, montane becoming reddish, 2–3 mm long. Fruits 3–4 mm long, keeled with a curved beak (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
BC to NL south to CA, WY, OK, TN and VA (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 26

(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 water of lakes, ponds; valleys, montane (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

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