. Contributions from the National Herbarium. Plants; Plants. Diatoms of the Genera Plagiogramma and 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 National Herbarium; Smithsonian Institution; United States National Museum; United States. Division of Botany. Washington : G. P. O.

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Keywords: ., bookcentury1800, bookdecade1890, bookpublisher, booksubjectplants