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HISTOLOGY

Jun 27, 2026

The Photo Library

The library containing photos from all the other histology pages-- adapted to look at the images closely and organized by genus and species.

Jan 1, 2026

The Basics: Cell Types

Understand what constitutes ground, dermal, and vascular tissues, along with detecting the specific cell types that fit into these tissue categories. We will look at how to identify parenchyma, collenchyma, sclerenchyma, sieve tube elements, vessel elements, tracheids, and so much more!

Jan 1, 2026

The Basics: Stelar Morphology

Learn the basics behind what constitutes a stele and the evolutionary history of steles supported by the latest research on stelar morphology. Master how to distinguish between an atactostele, eustele, siphonostele, and protostele.

Jan 1, 2026

Standard Secondary Growth

This section looks into how plant tissues form the secondary growth found in most of the plants we consider trees.

Jan 1, 2026

Anomalous Secondary Growth

This latest section explores why some of the plants we see out and about happen to have secondary, or woody growth, despite the fact that we do not consider than trees. This accounts for woody grape vines, cacti, and even the roots of strangler figs, which can lignify over the course of time. If you don't know what lignify means, this article is for you!

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