. Contributions from the Botanical Laboratory, vol. 11. Botany; Botany. PROTOPLASMA Volume XVIII 4^ Phite II ^ -^•f^ M r ^ J. * * f. A* J- ir * 1<? t H^f CONWAY ZIRKLE Verlag von Gehruder 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