Lappula squarrosa subsp. heteracantha Lappula semicincta Cynoglossospermum semicinctum Lappula heterocarpa Lappula myosotis subsp. heteracantha Cynoglossospermum cynosum Echinospermum cymosum Echinospermum heteracanthum Echinospermum semicinctum Lappula echinata var. heteracantha Lappula heteracantha subsp. heterocarpa
World Flora Online, http://www.worldfloraonline.org/, accessed June 20, 2024