What is the Purpurascens coffee varietal?

Purpurascens is a rare Arabica cultivar characterised by distinctly purple-coloured leaves - a pigmentation mutation producing dark red or purple foliage rather than standard green. It's not commercially cultivated due to low productivity and cup quality that offers no advantage over conventional varieties.

The colouration results from anthocyanin pigment expression in the leaf tissue - the same pigment behind red and purple colouration in many other plant species. Visually striking, but of no known benefit to flavour.

Purpurascens is maintained in research collections as part of the broader Coffea arabica gene pool. It's the kind of botanical curiosity that demonstrates the range of natural variation within the species. Worth knowing as a genetic footnote rather than anything you'd expect to encounter on a green coffee offer sheet.