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Montana Field Guide

Montana Field Guides

Duck-meal - Spirodela polyrrhiza


Global Rank: G5
State Rank: SNR

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

External Links






 
General Description
Fronds obovate to orbicular, flattened, 3–8 mm long, attached together in groups of 3 to 10, green. Roots 1–3 cm long, several from each frond. Inflorescence a flower-bearing pouch on each side of the frond that also serves as point of attachment to other fronds. Seeds 1 or 2, ribbed or smooth (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Present
 


Range Comments
Circumboreal through all of N. America (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 7

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Relative Density

Recency

 

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



Habitat
Fresh water of ponds, lakes, often with Lemna minor (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Duck-meal — Spirodela polyrrhiza.  Montana Field Guide.  .  Retrieved on , from