It is hard to find the tool to report incorrect keywords now (it was changed from an icon to a link) but on any photo you can click on the Tools link under the image and there you will find a way to report incorrect keywords. This isn't as obvious as it was in the past, especially for buyers, so many wrong words are left when they should be removed. The reviewers are not experts on the plants that they are looking at, they review basic keywords and the technical quality of photos. They depend on the expertise of those who submit the images and assume that they are putting the correct terms and descriptions in those fields but many are not. If you run across wrong words please report them with that tool. Yes, it is very frustrating as there are many images with incorrect information. You will find these same problems on every microstock site but at DT it can be reported (if you can find the link).
Great, I love it when someone cares enough to make suggestions for improvement, it helps us all. You could also send him/her a comment on that same tools tab. Perhaps they were unaware of the incorrect words. Hopefully all contributors would want to know if they had incorrect words. At times language barriers prevent the best keywords and it could have been a mistake in translation. You could also send a note to Support and the portfolio would be looked at.