. Contributions from the Botanical Laboratory and the Morris Arboretum of the University of Pennsylvania, vol. 13. Botany; Botany. ^v CONTENTS. Morris Arboretum FORWARD The present volume of the Contributions of the Department of Botany and of the Morris Arboretum of the University of Pennsylvania contains a collection of the papers published by the members of the Botanical department in several periodicals between 1935 and 1936. In this collection the subject of Botany is ^iven a broad definition reflectinji the several lines of interest developed in the group. Rodney H. True Chairman, Depart


. Contributions from the Botanical Laboratory and the Morris Arboretum of the University of Pennsylvania, vol. 13. Botany; Botany. ^v CONTENTS. Morris Arboretum FORWARD The present volume of the Contributions of the Department of Botany and of the Morris Arboretum of the University of Pennsylvania contains a collection of the papers published by the members of the Botanical department in several periodicals between 1935 and 1936. In this collection the subject of Botany is ^iven a broad definition reflectinji the several lines of interest developed in the group. Rodney H. True Chairman, Department of Botany Director, Morris Arboretum. V i I ••> i I I .1 i > ( 4 4 i ANDERSON, LEWIS E.: Mitochondria in the life cycles of certain higher plants. American Journal of Botany, 23:490, (1936). BOESHORE, IRWIN and WILLIAM D. GRAY: An Upper Cretaceous wood: Torreya antiqua. American Journal of Botany, 23:524, (1936). CARLSON, J. GORDON: Effects of several fixatives on staining reactions in Zea mays, especially with reference to the Feulgen reaction. Cytologia, 7:104, (1936). CHILDS, THOMAS W.: See H. H. York. EDWARDS, JOHN K.: Cytological studies of toxicity in meristem cells of roots of mays. I. The effects of the neutral salts. American Journal of Botany, 23:483, (1936). FOGG, JOHN M., JR.: Lophotucarpus spongiosus in Salem County, New Jersey. Bartonia, 17:21, (1936). GRAY, WILLIAM D.: Myxomycetes of Clark County, Indiana. Proceedings of the Indiana Academy of Science, 45:69, (1936). Notes on plasmodial behavior of Stemonitis fusca Roth. Proceedings of the Indiana Academy of Science, 45:74, (1936). See I. Boeshore. See E. T. Wherry. HUTCHINSON, W. G.: A method for staining rust mycelium in woody tissues. Phytopathology, 26:293, (1936). JUMP, JOHN AUSTIN : Wound responses of Ficus australis. Bul- letin of the Torrey Botanical Club, 63:477, (1936). McQUILKIN, WILLIAM EVERETT: Root development of pitch pine, with some comparative observations on shortleaf pine. J


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