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Show LONDON: PRINTED BY WILLIAM CLOWES AND SONS, LDIITED, STAMFORD STREET AND CIIARINO CROSS. CONTENTS. INTRODUCTION •• Page 1-9 CHAPTER I. '11 HE CmcUMNUTATING MoVEMENTS OF SEEDLI NG PLAN'l'S. Brassica oleracea, circumnutation of the radicl e, of the arched hypocotyl whilst still buried beueath the ground, whilst rising above the ground and straightening itself, and when eroct-Cjrcumn:u- · tation of the cotyledons-Rate of movement- Analogous observations on various organs in species of Githago, Gossypium, Oxalis, 'l'roproolum, Citrus, A.:sculus, of several Legumir.wus and Cucurbitaceous genera, Opuntia, Helianthus, l'l'imula, Cyclamen, Stapelia, Cerinthe, Nolana, Solanum, Beta, Ricinus, Quercus, Corylus, Pinus, Cycas, Canna, Allium, Asparagus, Phalaris, Zea, Avena, Nophrodium, and Selaginella 10-61) CHAPTER II. GENERAL CONSIDERATIONS ON THE MOVEMENTS AND GnoW'l.'H. 01r SEEDLING PLANTS. Generality of tho circumnutatinf!: rnovemont- Ha<liclcs, their circumnutation of service- Manner in which they penetrate tho ground-Manner in which hypocotyls and other organs break through the ground by being arched-Singular manner of germination in Megarrhiza, &c.-Abortion of cotyledons-Circumnutation of hypocotyls and epicotyls whilst still burieJ. and .arched-Their power of straightening themselves-Bursting of the seed-coats-Inherited effect of tho arching process in hypo- UNIVERSITY OF UTAH UBRARfES |