Jump to ContentJump to Main Navigation
The World of Northern Evergreens$
Users without a subscription are not able to see the full content.

E. C. Pielou

Print publication date: 2011

Print ISBN-13: 9780801477409

Published to Cornell Scholarship Online: August 2016

DOI: 10.7591/cornell/9780801477409.001.0001

Show Summary Details
Page of

PRINTED FROM Cornell University Press SCHOLARSHIP ONLINE (www.cornell.universitypressscholarship.com). (c) Copyright University of Cornell University Press, 2022. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in Cornell for personal use. date: 29 June 2022

Two Kinds of Trees: Conifers and Broadleafs

Two Kinds of Trees: Conifers and Broadleafs

(p.67) Chapter 6 Two Kinds of Trees: Conifers and Broadleafs
The World of Northern Evergreens

E. C. Pielou

Cornell University Press

This chapter considers the contrast between the two kinds of tree. Not all conifers are evergreen, and not all broadleafs are deciduous. The differences between them are profound, so much so that it is ludicrous, nowadays, to lump them collectively as “trees.” The greatest contrast between conifers and broadleafs is in their reproductive systems. In conifers, the ovule in a cone is naked in the sense that the pollen tube has direct access to it; in broadleafs, the ovule in a flower is inside a carpel, a soft outer covering that the pollen tube has to penetrate to reach the integument and ovule. Conifers have longer life spans and longer “decay spans” than broadleafs. The trunk of a conifer grows straight up without dividing. Broadleafs are sometimes shaped like conifers, but very often their trunks divide, their branches grow to be almost as thick as the trunk divisions, and the crown of the tree becomes rounded.

Keywords:   conifers, broadleafs, coniferous trees, cones, flowers, ovules, reproductive systems

Cornell Scholarship Online requires a subscription or purchase to access the full text of books within the service. Public users can however freely search the site and view the abstracts and keywords for each book and chapter.

Please, subscribe or login to access full text content.

If you think you should have access to this title, please contact your librarian.

To troubleshoot, please check our FAQs, and if you can't find the answer there, please contact us.