It's easy to assume that after centuries of botanical exploration, most plant species have already been found and named. For a family the size of Melastomataceae, that assumption is wrong — new species are still being formally described on a regular basis, particularly from under-surveyed tropical regions.
Finding something unnamed
The process usually starts in the field, when a researcher collects a specimen that doesn't clearly match any known species — an unusual leaf shape, an unfamiliar flower structure, or a population that turns out to be geographically or genetically distinct from its closest known relative. A single interesting-looking plant isn't enough on its own; a proper description typically needs multiple specimens, ideally from more than one collecting trip.
Comparing it against everything already known
Before anything can be called "new," researchers have to rule out that it's already been described under a different name — a surprisingly common outcome, especially in large, historically under-studied genera like Miconia. This involves comparing the specimen against herbarium collections, published literature, and increasingly, genetic data.
Publishing the description
Once a plant is confirmed as genuinely new, it has to be formally described in a peer-reviewed botanical publication, following strict rules set out in the International Code of Nomenclature. The description includes precise physical measurements, comparisons to its closest relatives, and the designation of a "type specimen" — a single reference sample, usually held at a herbarium, that permanently anchors what that species name actually refers to.
A type specimen isn't just paperwork — it's the physical object every future debate about that species' identity gets measured against.
University herbaria play a central role in this process, maintaining the physical collections that both new descriptions and later taxonomic revisions depend on — see our Research page for more on where this kind of primary work actually happens.