Origanum vulgare 'Aureum'
- photo and horticultural data
- http://www.mobot.org/gardeninghelp/plantfinder/Plant.asp?code=A251

Floridata: Origanum majorana
- Photo, description and other valuable horticultural data
- http://www.floridata.com/ref/O/orig_maj.cfm

Origanum tyttanthum
- photo
- http://web.axelero.hu/arbix/fuszer/photos/origanum-tyttanthum-1b.jpg

Origanum syriacum
- photo
- http://web.axelero.hu/arbix/fuszer/photos/origanum-syriacum-2b.jpg

Origanum acutens
- photo
- http://www.backyardgardener.com/rick/Origanum%20acutens.jpg

Origanum laevigatum
- photo
- http://www.stauder.net/bildearkiv/Origanum%20laevigatum%20'Herrenhausern'%20RS.jpg

Origanum vulgare
- photo
- http://www.toyen.uio.no/botanisk/nbf/plantefoto/origanum_vulgare_Norman_Hagen01.jpg

Oregano
- International Plant Genetic Resources Institute proceedings volume dealing with the taxonomy, distribution, origin, conservation, cultivation and commercial production of genus Origanum.
- http://www.ipgri.cgiar.org/publications/pdf/199.pdf

Origanum heracleoticum
- image
- http://www.dipbot.unict.it/orto/0674-1.html