Most wine authorities seem to agree that the Negramoll grape variety of the Canary Islands and the Tinta Negra Mole grape of Madeira are in fact the same, however no one has yet proved this fact. There is more information out there on Tinta Negra Mole, though not a great deal. Negramoll rarely gets a mention. It’s obviously one of the rarer local grape varieties.
Click on the image below to get the opinion of Wine-Searcher.com on this grape.