These individuals should have a permit to collect and export from
these "far flung corners". These individuals must have a good
knowledge of the taxon in question before they can know they "really"
have found something new (rather than something they just can't identify).
Usually permits will only be issued for scientific research purposes.
This should imply that the persons involved are conducting a justifyable
research project. If this is a taxonomic project then they should be
expected to have read the International Code of Botanical Nomenclature
and be prepared to deal with the rules therein, even if the rules are
not perfect.
Michael Chamberland