adverb /ˈlɑrdʒli,ˈlaːdʒ.li,ˈlɑːdʒ.li,ˈlɑɹdʒ.li/
They were largely successful in their efforts.
Herbarium material does not, indeed, allow one to extrapolate safely: what you see is what you get; what you get is classical alpha-taxonomy which is, very largely and for sound reasons, in disrepute today.
Wikipedia foundation.