Editing Huperzioideae (section)

{{Short description|Subfamily of plants}}
{{Automatic taxobox
| image = Huperzia lucidula.jpg
| image_caption = Shining firmoss, ''[[Huperzia lucidula]]''
| taxon = Huperzioideae
| authority = W.H.Wagner & Beitel ex B.Øllg.<ref name=PPGI/>
| subdivision_ranks = Genera
| subdivision =
* ''[[Huperzia]]'' <small>Bernh.</small>
* ''[[Phlegmariurus]]'' <small>Holub</small>
* ''[[Phylloglossum]]'' <small>Kunze</small>
}}

'''Huperzioideae''' is a subfamily of [[Lycopodiopsida|lycopsids]] in the family [[Lycopodiaceae]]. It has sometimes been recognized as a separate family, '''Huperziaceae'''. The [[Pteridophyte Phylogeny Group]] classification of 2016 (PPG I) recognizes three extant genera:<ref name=PPGI/>
* ''[[Huperzia]]'' (temperate firmosses); about 25 species; terrestrial.
* ''[[Phlegmariurus]]'' (tropical firmosses); about 250 species; previously included in ''Huperzia''; mainly [[epiphyte]]s.
* ''[[Phylloglossum]]'' (pygmy clubmoss); formerly thought to be only distantly related to ''Huperzia''. This is a terrestrial, grass-like plant with basal, 2–5&nbsp;cm long, fleshy [[Leaf|leaves]]. The only accepted species is ''[[Phylloglossum drummondii]]''.

The plants are distinct from those of other members of the Lycopodiaceae in having erect (not creeping) growth; and in their [[spore]]-bearing structures being produced in the axils of unmodified [[leaf|leaves]], rather than in terminal club-like structures. The subfamily also has a basal chromosome count of ''n''=67, versus counts of ''n''=23, 34 in the Lycopodiaceae.{{citation needed|date=October 2019}}