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Phylogenetic analyses, biogeography, morphology, and ecology confirm that Helenium scaposum is a distinct species belonging to genus Helenium. Within Helenium, it appears that H. scaposum is most closely related to members of Helenium sect. Leptopoda. The morphological resemblance of H. scaposum to H. drummondii, H. pinnatifidum, and H. vernale justifies further study to better understand relationships among these species.
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Bierner et al. (2020) studied this question.
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