A Close-up View of the Wildflower, New England Aster
- Photographic study by Brian Johnston of Aster novae-angliae, with fine images of the plant on a macroscopic and microscopic scale.
- http://www.microscopy-uk.org.uk/mag/artdec03/bjaster.html

Aster tripolium
- Photograph of the Sea Aster and a description.
- http://www.plant-identification.co.uk/skye/compositae/aster-tripolium.htm

Asters: An Overview
- Discussion of the taxonomy of these plants, including justification for the split of the traditional genus Aster into many different genera.
- http://www.science.uwaterloo.ca/~jcsemple/asters.htm

Aster alpinus
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- http://plants.usda.gov/java/profile?symbol=ASAL3

Aster cordifolius (Blue Wood Aster)
- Physical features, range, habitat, and physical characteristics. Includes a photo.
- http://www.illinoiswildflowers.info/woodland/plants/bl_woodaster.htm

Some of Manitoba's Asters
- Images of many species.
- http://www.naturenorth.com/fall/asters/asters3.html