The text structure of description can go by various names. Some resources call it description; others call it statement and support; still others call it main idea/detail. Whatever it is called, this text structure is based on making a statement, and then supporting it with details.
The buttonbush is a plant that can be found along many rivers and streams. Although it can reach 15 feet tall, it usually only grows a few feet. Its flowers, about the size of a ping-pong ball, bloom through the summer. The flowers are replaced by brown, ball-like fruits in the autumn.
In the past, I've found description to be the easiest text structure to find,whether in textbooks, trade books, or magazines. One especially nice series is published by Peachtree. The latest one is About Raptors.
written by Cathryn Sill
illustrated by John Sill
All of the books in this series are written in a simple style. Each page contains only one sentence. There are about three main ideas in each book, supported by details. This book is an easy read, but the pictures and specific information make it worthwhile for read alouds even up through sixth grade. If you're looking for a place to start with description, these books would be a strong choice.