Harvard University Herbaria & Libraries

Index of Botanical Specimens

Classification	Potamogetonaceae: Potamogeton
Harvard University Herbaria Barcode(s)	00967202
Collector	H. D. Thoreau
Country	United States of America
State	Massachusetts
Geography	North America: North America (CA, US, MX) (Region): United States of America: Massachusetts: Middlesex County: Concord
Locality	Bartonia Ditch [Bartonia Ditch probably refers to A. Wheeler’s meadow where he found “Bartonia. tenella” (= Bartonia virginica) July 31, 1856]
GUID	http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/200c321c-0324-4db3-bfca-fd2d039850ab
Harvard University Herbaria Barcode	00967202
Herbarium	GH
Family	Potamogetonaceae
Determination	Potamogeton epihydrus Rafinesque
Determined by	Kittredge, Walter Tobey
Date Determined	2017
Determination Remarks	[current name]
Family	Potamogetonaceae
Determination	InQuestion Potamogeton rufescens Schrader
Determined by	[annotation on sheet]
Subcollection	Thoreau Herbarium
Phenology	Flower
Preparation Type	Sheet
Preparation Method	Pressed

Remarks

["July 31. . .Also much of the Bartonia tenella which has been out some days at least 5 rods from ditch & 3 from Potter's fence" " Near head of boundary ditch close by a new potamogeton out ap[parently] not a great while now ap.[parently] in prime - I [call] it the Narrow - elliptic leaved floating. Give this name to the Clam shell P.[otamogeton] of which this is ap[parently] a ditch kind. v[ide] 27 & 30th" Journal 8: 435. 1856, published and unpublished portions.]