Trees of the Northern United States

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A. C. Apgar. Trees of the Northern United States

Trees of the Northern United States

Table of Contents

PREFACE

TREES

PART I. THE ESSENTIAL ORGANS, AND THE TERMS NEEDED FOR THEIR DESCRIPTION

Chapter I. Roots

Chapter II. Stems and Branches

Chapter III. Leaves

Chapter IV. Flowers and Fruit

Chapter V. Winter Study of Trees

Chapter VI. The Preparation of a Collection

Chapter VII. Figures to be used in Botanical Description

PART II. PLAN AND MODELS FOR TREE DESCRIPTION

PART III. KEY, CLASSIFICATION AND DESCRIPTION OF THE SPECIES

GLOSSARY OF BOTANICAL TERMS. AND. INDEX TO PART I

INDEX TO PART III

Отрывок из книги

A. C. Apgar

Their Study, Description and Determination

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Fig. 6.

Caution.—In some plants the leaves on the side shoots or spurs of a twig are so close together, the internodes being so short, that at first sight they seem opposite. In such cases, the leaf-scars of the preceding years, or the arrangement of the branches, is a better test of the true arrangement of the leaves. The twig of Birch shown in Fig. 5 has alternate leaves.

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