Ophioglossum gomezianum in... www.researchgate.net

Flora of Caprivi:... www.capriviflora.com

Flora of Zambia: Species... www.zambiaflora.com

West African Plants - A... www.westafricanplants.senck...

Ophioglossum - Wikipedia en.wikipedia.org

West African Plants - A... www.westafricanplants.senck...

Flora of Zambia: Species... www.zambiaflora.com

Flora of Caprivi:... www.capriviflora.com

Consortium of Midwest... midwestherbaria.org

SEINet Portal Network -... swbiodiversity.org

Flora of Zambia: Species... www.zambiaflora.com

adder's-tongues (Genus... www.inaturalist.org

adder's-tongues (Genus... www.inaturalist.org

Ophioglossum L. | Plants of... powo.science.kew.org

Ophioglossum nudicaule /... dev.florida.plantatlas.usf....

Ophioglossum - Wikispecies species.wikimedia.org

Discovery of Whittieria... phytokeys.pensoft.net

Species www.fernsofafrica.com

Ophioglossum L. | Plants of... powo.science.kew.org

adder's-tongues (Genus... www.inaturalist.org