If it were my newsletter, I'd simply insert a header
"Here are random examples of entries from our extensive database of plants; follow the links to see more images, info, and comments from fellow gardeners"
5 people posted because this plant being in a newsletter with no explanation seems a recommendation. Do you want to have this discussion with Oriental bittersweet, Ficaria verna, Japanese hops etc?
And I'd add another checkbox to the Miscellaneous category of plant details. "reported noxious or invasive in some regions"
