. Contributions from the Botanical Laboratory, vol. 11. Botany; Botany. PROTOPLASMA Volume XIX Plate II \. CONWAY ZIRKLE Verlag von Gebriider Borntraeger in Leipzig INTENTIONAL SECOND EXPOSURE. 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; University of Pennsylvania. Morris Arboretum. Philadelphia : [s. n. ]

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Keywords: ., bookcentury1900, bookpublisherphiladelphiasn, booksubjectbotany