Asclepias subulata
- Photograph of the Desert Milkweed and cultural information.
- http://www.azarboretum.org/plantlist/desertmilkweed.htm

A Close-up View of Common Milkweed
- Photographic study by Brian Johnston of Asclepias syriaca, with fine images of its flowers and all its intricate parts.
- http://www.microscopy-uk.org.uk/mag/artfeb05/bjmilkweed.html

Asclepias syriaca
- Common Milkweed.
- http://plants.usda.gov/java/profile?symbol=ASSY

Asclepias speciosa - Showy Milkweed
- Description, photograph, U.S. distribution, and other information.
- http://plants.usda.gov/java/profile?symbol=ASSP

Asclepias purpurascens
- Purple Milkweed.
- http://plants.usda.gov/java/profile?symbol=ASPU2

Asclepias amplexicaulis
- Clasping Milkweed.
- http://plants.usda.gov/java/profile?symbol=ASAM

Asclepias quadrifolia
- Fourleaf Milkweed.
- http://plants.usda.gov/java/profile?symbol=ASQU

Asclepias rubra
- Red Milkweed.
- http://plants.usda.gov/java/profile?symbol=ASRU

Asclepias sullivantii (Prairie Milkweed)
- Physical characteristics, range, habitat, and faunal associations. Includes images.
- http://www.illinoiswildflowers.info/prairie/plantx/pr_milkweedx.htm

Asclepias speciosa (Showy Milkweed)
- Range, physical features, habitat, and ethnobotany. Includes an image.
- http://www.npwrc.usgs.gov/resource/plants/wildflwr/species/asclspec.htm

Keir's Botanical Photo Archive - Asclepiadaceae
- Floral images from the US.
- http://www.keiriosity.com/asclepiadaceae/asclepiadaceae.html

Asclepias curassavica
- Description and image.
- http://www.floridata.com/ref/a/ascl_cur.cfm

Milkweed Family Photos
- Images of seven species of Asclepias in North Carolina.
- http://www.rlephoto.com/botanicals/milkweeds01.htm

Asclepias
- Short description of the genus, with emphasis on medicinal qualities and uses.
- http://www.botanical.com/botanical/mgmh/a/ascle072.html

Asclepias speciosa
- image
- http://www.botany.hawaii.edu/faculty/carr/images/asc_spe_fl.jpg