Helminthostachys is a fern genus in the Ophioglossaceae (adder's tongue) family.details Tropicos.org. Missouri Botanical Garden. 15 Jan 2012 It is widespread throughout southeast Asia and Australia.
Taxonomy The Smith et al. classification of 2006, based on molecular phylogeny, placed Helminthostachys in Ophioglossaceae. Subsequent classifications have maintained this placement. The PPG I classification assigns it as the sole member of the subfamily Helminthostachyoideae.
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