focus on... Historical herbarium sheets
The herbarium of the National Botanic Garden of Belgium (BR) acquired a collection of herbarium sheets from the Universitas Lovaniensis (LV) herbarium. Amongst them 16 sheets of Peperomias.

Here is a list of the acquired historical specimens with links to the full images.
Peperomia argyreia (as sandersii)
Peperomia blanda (1)
Peperomia blanda (2)
Peperomia brittonii
Peperomia eburnea
Peperomia edulis
Peperomia fraseri
Peperomia freireifolia (Type)
Peperomia hilariana
Peperomia magnoliifolia
Peperomia marmorata
Peperomia procumbens
Peperomia quadrifolia aff.
Peperomia rotundifolia
Peperomia umbilicata
Peperomia velutina