This series of images shows the work of biologist Karl Niklas on the adaptations and evolution of plants. From The Evolutionary Biology of Plants.

[Free Registration/Login Required] This is a visual of the family tree of Shakespeare's history plays which includes the lineage and also pictures from Royal Shakespeare Company productions of Richard II, Henry IV, and Henry V.

Find the human ancestor you are interested in and click on it either in the timeline or the list below for more details. Each fossil or reconstruction pictured includes links to more details about it.

This lesson defines the phrase tree diagram. It is 4 of 5 in the series titled "Tree Diagram."

This lesson defines the phrase tree diagram. It is 1 of 5 in the series titled "Tree Diagram."

An easy page to learn about the red eyed tree frog provides pictures and a little about their habitat and diet.

A very detailed graphic listing Jesus's parents, brothers (and possibly sisters) and their descendants.

Snow-covered trees.

The tutorial discusses species that have chemical compounds to fight human illnesses. Some topics include "penicillium" mold, cinchona tree, and "streptomyces" bacteria. The activity consists of a printable version and interactive version.

A virtual who's who of invasive plants, herbs, vines, shrubs, and trees. This comprehensive site provides easy-to-read fact sheets that contain native ranges, plant descriptions, ecological threats, U.S. distributions & habitats,...

An image of the Nebraska State Tree.

christmas tree

An image of the Oregon State Tree.

An image of the Washington D.C. Tree.

General Sherman Sequoia tree.

A clipart illustration by Phillip Martin titled "State Tree of Hawaii - Kukui Tree (Candlenut)."

This lesson plan has students identify trees, perform bark rubbings and sketches, collect leaves, and then introduce a tree to their classmates.

An image of the Florida State Tree.

An image of the Florida State Tree.

An image of the New Mexico State Tree.

Palm tree.

Simple family tree showing how traits are passed through the family tree.

Tree-shaded lane in Kerepesi Cemetery (Budapest)

Palm Trees at the National Garden (Athens)