Plants and animals form the core of what comes to mind when we think about "environment."

These and many other plants would have formed the base of a complex food web.

In about three weeks, the plant forms a big green pod.

If the nights are too cool, the plants never form flowers.

Under the best conditions plants can form a mat that is two feet thick.

All these plants and animals form a coral reef community.

Plants form a thicket with no sign of a trunk.

If you prepare the seeds early enough, the plants will form leaves and flower all in one season.

Plants form a blanket of runners on the soil surface.

Mature plants often form large clumps with numerous growth points.