Alocasia reginula, black velvet, is a species of flowering cormous aroid (family Araceae), native to Sabah state in Malaysia.
Originally described from cultivation, and often sold as “Alocasia 'Black Velvet'”, it is not a modern cultivar or hybrid; A. reginula is its own natural species.
[4] Many plant vendors and stores sell houseplants in far too thick and dense of potting media.
A beneficial practice is to simply remove the plant, briefly, to amend the substrate and add more porosity and drainage.
Alternatively, many growers report successful, thriving growth when the corms are planted in pure sphagnum moss.