Hypnaceae
- Photographic images of 6 genera.
- http://www.bioimages.org.uk/HTML/T6549.HTM

Hypnum lacunosum
- A description of the habitat in which this species grows in Wales, along with a photograph of the gametophyte.
- http://home.clara.net/adhale/bryos/hlacunos.htm

Hypnum cupressiforme var. cupressiforme
- A description of the habitat in which this species grows in Wales, along with a photograph of the gametophyte.
- http://home.clara.net/adhale/bryos/hcupcup.htm

Hyocomium armoricum
- A description of the habitat in which this species grows in Wales, along with a photograph of the gametophyte.
- http://home.clara.net/adhale/bryos/hyarm.htm

Hypnum curvifolium
- A photograph of gametophytes bearing sporophytes.
- http://www.science.siu.edu/landplants/Bryophyta/images/Hypnum.JPEG