Huperzia
- Photographs of several species of Huperzia growing in their natural habitat in Hawaii.
- http://jupiternielsenflameworking.com/hawaiianflora/huperzia.html

Fir Clubmoss: Huperzia selago
- Description of this species, also known as Lycopodium selago, and several photographs.
- http://www.plant-identification.co.uk/skye/lycopodiaceae/huperzia-selago.htm

Huperzia dichotoma (Jacq.) Trevis.
- Taxonomic data and mapped distribution of this club-moss from Atlas of Florida Vascular Plants
- http://www.plantatlas.usf.edu/main.asp?plantID=2895

Tracheids in Huperzia lucidula
- Development of tracheids in the basal extant vascular plant Huperzia lucidula (Lycopodiaceae): implications for the early evolution of plant water-conducting cells (Abstract).
- http://www.ou.edu/cas/botany-micro/bsa-abst/section8/abstracts/30.shtml