University of Colorado Museum of Natural History Herbarium Vascular Plant Collection
Catalog #: 00608984
Secondary Catalog #: 52932
Taxon: Persicaria amphibia (L.) S. Gray
Collector: Joseph Andorfer Ewan   13799   
Date: 1941-08-17
Verbatim Date:17 August 1941
Locality: United States, Colorado, Gilpin, Sayre Ranch, nw of Rollinsville.
39.9314435  -105.5142727 +-1000m.  WGS84
Georeference Remarks: BLM lists a Sayers Ranch at 1S, 73W S 25 E1/2 of the NW 1/4 of the SW 1/4 of the section. This places the point on Los Lagos Reservoir #1 which appears to fit the description given. RA
Elevation: 2591 meters
Verbatim Elevation: 8500 ft
Habitat: Colonies on lake surface as floating pls. and on wet sandy shore where it is flowering.
Reproductive Condition: Flr
Occurrence Remarks: Polygonum natans f. genuina Stand., det. H.D. Harrington, 1948. / Polygonum amphibium L., William A. Weber, 27 October 1948. Original ID: Polygonum amphibium. Acute or acuminate lvs. of terrestrial pls. are thicker than obtuse leaves of aquatic pls.
Specimen Images
Record Id: a66293f8-e066-4957-8fbc-fcd744350624
Occurrence ID (GUID): a66293f8-e066-4957-8fbc-fcd744350624
For additional information on this occurrence, please contact: J Ryan Allen (
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