. Contributions from the Botanical Laboratory, vol. 4. Botany; Botany. Bot. Contrih. Univ. Penn. Vol IV, Plate LXXII. Fig. 6. 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 University of Pennsylvania. Botanical Laboratory. Philadelphia : University of Pennsylvania Press

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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbotany, bookyear1892