. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. 15. Potamogeton perfoliatus L. Potamogeton perfoliatus L. Sp. PI. 126. 1753- Potamogeton perfoliatus lanceolatus Robbins in A. Gray, Man. Ed. 5, 488. 1867. Not Blytt 1861. Potamogeton perfoliatus Richardsonii A. Bennett, Journ. Bot. 27 : 25. 1889. Potamogeton Richardsonii Rydb. Bull. Torrey Club 32 : 599. 1905. Potamogeton bupleuroides Fernald, Rhodora 10 : 46.
. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. 15. Potamogeton perfoliatus L. Potamogeton perfoliatus L. Sp. PI. 126. 1753- Potamogeton perfoliatus lanceolatus Robbins in A. Gray, Man. Ed. 5, 488. 1867. Not Blytt 1861. Potamogeton perfoliatus Richardsonii A. Bennett, Journ. Bot. 27 : 25. 1889. Potamogeton Richardsonii Rydb. Bull. Torrey Club 32 : 599. 1905. Potamogeton bupleuroides Fernald, Rhodora 10 : 46. 1908. Stems slender, much branched. Leaves all sub- merged, orbicular or ovate, sometimes lanceolate, obtuse or acutish and minutely serrulate at the apex, cordate-perfoliate at the base, s"-2o" long, 3"-i2" wide; peduncles ii' long, usually erect or slightly spreading; spikes 8"-i2" long, often flowering and fruiting under water; fruit obliquely obovoid, ii"-2" long, ii" thick, obscurely 3-carinate on the back, the face slightly curved outwardly toward the top, the sides with a shallow indentation which runs into the face; style nearly facial; embryo slightly incurved or with its apex pointing directly toward the base. In ponds and streams, Newfoundland to British Co- lumbia, south to Florida and California. Also in Europe and Asia. Clasping-leaved Pondweed. Fig. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Britton, Nathaniel Lord, 1859-1934; Brown, Addison, 1830-1913. New York, Scribner
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
