This is interesting Erlend! Thank you!
However those larger plants could be
Musa itinerans var. formosana, but I think not. Rather more like
M. basjoo for me. Besides, the smaller picture to the side showing the purple bud is certainly not formosana, and I don't think that bud is from the same plant in the other picture. I also have to disagree with the text in that
Musa itinerans var. formosana is a taller plant than
M. basjoo.
I think they may have just used random pictures from different sources to make the article. Which is a shame, because I really would like to see the correct pictures.
Looking at the flower - I would guess
Musa yunnanensis or
Musa cheesmanii, or
Musa balbisiana var. liukiuensis.