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Betonica alopecuros
http://flora.nhm-wien.ac.at/Seiten-Arten/Betonica-alopecuros.htm
Betonica alopecuros photo
Betonica grandiflora
http://ispb.univ-lyon1.fr/cours/botanique/photos_dicoty/dico%20A%20a%20C/Betonica%20grandiflora.jpg
Photo
Betonica hirsuta
http://flora.nhm-wien.ac.at/Seiten-Arten/Betonica-hirsuta.htm
Betonica hirsuta photo
Betonica in Flora of China @ efloras.org
http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=103886
A taxonomic description,genus author, and reference citation for the genus Betonica
Betonica officinalis
http://www.plant-identification.co.uk/skye/labiatae/betonica-officinalis.htm
Photos and description of Betonica officinalis