. Bulletin of the Department of Agriculture. Agriculture; Agriculture. Fig. 9.—Potamogeton natans. B394M Fig. 10.—Potamogeton Fig. 11.—Potamogeton heterophyllus. Fig. 12.—Potamogeton lonchites. B397M Figs. 9—12.—Wide-ranging species of pondweeds. (From Morong.). 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 United States. Dept. of Agriculture. [Washington, D. C. ?] : The Dept. : Supt. of Docs. , G. P. O.

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