Ten Asclepias species compared through exact Wikimedia Commons photographs of flowers and foliage. An editorial selection, not a scientific ranking. Original video contributions: CC BY-SA 4.0. Individual photographs retain the licences and credits listed in attribution; public-domain and CC0 photographs remain so. Photograph credits: 1. File:Asclepias tuberosa interior.jpg; Eric Hunt; CC BY-SA 4.0; https://creativecommons.org/licenses/by-sa/4.0; https://commons.wikimedia.org/wiki/File%3AAsclepias_tuberosa_interior.jpg; Whole-image fit and scaling; title and caption bars added. Photograph licensed under the stated source licence. 2. File:Swamp milkweed monarch.jpg; The original uploader was Teune at English Wikipedia .; CC BY-SA 3.0; http://creativecommons.org/licenses/by-sa/3.0/; https://commons.wikimedia.org/wiki/File%3ASwamp_milkweed_monarch.jpg; Whole-image fit and scaling; title and caption bars added. Photograph licensed under the stated source licence. 3. File:Asclepias syriacus.tif; Amos Oliver Doyle; CC BY-SA 4.0; https://creativecommons.org/licenses/by-sa/4.0; https://commons.wikimedia.org/wiki/File%3AAsclepias_syriacus.tif; Whole-image fit and scaling; title and caption bars added. Photograph licensed under the stated source licence. 4. File:Asclepias speciosa1jakesmome.jpg; vicki watkins from USA; CC BY 2.0; https://creativecommons.org/licenses/by/2.0; https://commons.wikimedia.org/wiki/File%3AAsclepias_speciosa1jakesmome.jpg; Whole-image fit and scaling; title and caption bars added. Photograph licensed under the stated source licence. 5. File:Asclepias curassavica-Thekkady-2016-12-03-001.jpg; Jeevan Jose, Kerala, India; CC BY-SA 4.0; https://creativecommons.org/licenses/by-sa/4.0; https://commons.wikimedia.org/wiki/File%3AAsclepias_curassavica-Thekkady-2016-12-03-001.jpg; Whole-image fit and scaling; title and caption bars added. Photograph licensed under the stated source licence. 6. File:Asclepias purpurascens - Flickr - FritzFlohrReynolds.jpg; Fritz Flohr Reynolds from USA; CC BY-SA 2.0; https://creativecommons.org/licenses/by-sa/2.0; https://commons.wikimedia.org/wiki/File%3AAsclepias_purpurascens_-_Flickr_-_FritzFlohrReynolds.jpg; Whole-image fit and scaling; title and caption bars added. Photograph licensed under the stated source licence. 7. File:Asclepias verticillata Arkansas.jpg; Eric Hunt; CC BY-SA 4.0; https://creativecommons.org/licenses/by-sa/4.0; https://commons.wikimedia.org/wiki/File%3AAsclepias_verticillata_Arkansas.jpg; Whole-image fit and scaling; title and caption bars added. Photograph licensed under the stated source licence. 8. File:Asclepias viridis Arkansas.jpg; Eric Hunt; CC BY-SA 4.0; https://creativecommons.org/licenses/by-sa/4.0; https://commons.wikimedia.org/wiki/File%3AAsclepias_viridis_Arkansas.jpg; Whole-image fit and scaling; title and caption bars added. Photograph licensed under the stated source licence. 9. File:Asclepias exaltata (2985661678).jpg; homeredwardprice; CC BY 2.0; https://creativecommons.org/licenses/by/2.0; https://commons.wikimedia.org/wiki/File%3AAsclepias_exaltata_%282985661678%29.jpg; Whole-image fit and scaling; title and caption bars added. Photograph licensed under the stated source licence. 10. File:Asclepias variegata 2.jpg; Eric Hunt; CC BY-SA 4.0; https://creativecommons.org/licenses/by-sa/4.0; https://commons.wikimedia.org/wiki/File%3AAsclepias_variegata_2.jpg; Whole-image fit and scaling; title and caption bars added. Photograph licensed under the stated source licence.