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

Ophioglossum gomezianum in... www.researchgate.net

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

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

Flora of Malawi: Species... www.malawiflora.com

Ophioglossum - Wikipedia en.wikipedia.org

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

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

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

Taxonomy Ophioglossaceae -... observation.org

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

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

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

SEINet Portal Network -... swbiodiversity.org

Taxonomy Ophioglossaceae -... observation.org

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

Ophioglossum - Wikispecies species.wikimedia.org

Comparative phylogenetics... link.springer.com

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

World Plants: Plant List www.worldplants.de