Nierembergia, commonly known as cupflower, is a genus of flowering plants in the family Solanaceae (the nightshade family), order Solanales. GBIF recognises approximately 24 accepted species within the genus and a total of 32 descendant taxa.
Plants in this genus are native to South America, with the greatest diversity centred in Argentina and neighbouring countries. The genus includes both annual and perennial herbaceous plants as well as subshrubs. They are characterised by their small, cup-shaped or funnel-shaped flowers — the trait that gives rise to the common name cupflower — which typically appear in shades of white, violet, or lilac.
Several species, most notably Nierembergia hippomanica and Nierembergia rivularis, are cultivated as ornamental garden plants in temperate regions worldwide, valued for their long flowering season and compact growth habit. Nierembergia scoparia has become naturalised outside its native range in parts of North America.
The genus was established to honour Juan Eusebio Nieremberg (1595–1658), a Spanish Jesuit priest, naturalist, and mystic.
Etymology
The genus name Nierembergia commemorates Juan Eusebio Nieremberg (1595–1658), a Spanish Jesuit priest, naturalist, and mystic. The common name "cupflower" refers to the distinctive cup-shaped or funnel-shaped form of the flowers.
Distribution
Nierembergia is native to South America, with diversity concentrated in Argentina and adjacent countries. GBIF records accepted species including Andean representatives (N. andina, N. boliviana) as well as lowland and southern South American taxa. Some species, such as N. scoparia, have become naturalised in other parts of the world.
Cultivation
Several species of Nierembergia are grown as ornamental plants in temperate gardens, prized for their profuse cup-shaped flowers over a long season. Nierembergia hippomanica and N. rivularis are among the most commonly cultivated; they are typically grown as annuals or tender perennials in frost-prone climates and as perennials in warmer regions.
