The male pine cone (or flower) is responsible for forming pollen. These pollen grains are also visible in the image above. For a zoom-able image of a female pine cone, visit the following link:
Here is a large image of a dandelion seed. Happy exploring!
For more information on the pine cone, have a look at the following post: The specimen size is approximately 20mm from left to right.
Explore the cross-section of a stem with this virtual microscope. A flash player is needed.
The wood of a spruce tree (whitewood) under the microscope. The annual rings are clearly visible.
It is possible to observe the impression of leaf epidermis cells on white wood glue. The stomata and guard cells are easily visible. The regular shape of the stomata makes it an ideal specimen for practicing drawing.