Ask the Expert: I found this and was wondering what it was I found this flower on the side of the road and have never seen one like it. Can you tell me what type of flower it is? Thank you. Suzanne Plant Expert Reply: The lovely white flower is commonly called Spider Lily. It is a Hymenocallis. I'm not sure which Hymenocallis it is. It could be one of the following: Hymenocallis lirisome, Hymenocallis littoralis or Hymenocallis occidentalis. They usually bloom summer through autumn. Share this:Click to print (Opens in new window)Click to email a link to a friend (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on LinkedIn (Opens in new window) White Flowers Is Spider Lily (Hymenocallis lirisome)