Taxonomic implications of seed morphology in Melocactus (Cactaceae) from Cuba

Although Melocactus is the second-most diverse cactus genus in Cuba, there still no consensus regarding species circumscription. Seed morphology has not been used for classifying this group despite taxonomically useful data obtained some other genera of Cactaceae. In study, seeds were evaluated all taxa known from and seed morphological variability was analysed. descriptions each studied taxon (or localities) are presented here. We analysed 10 quantitative, 19 qualitative characters 50 14 accessions. Seeds native Cuba small to medium-sized, which place them among smaller Cactoideae, their shape circular broadly oval. Our results show that seven quantitative six suitable distinguish taxa. Such allowed establishing a general pattern M. matanzanus curvispinus group, however, harlowii less distinguishable using these characters. Colliculate relief characterized with testa border expanded, while identified by ventro-apical keel. The most delimitation length, hilum-micropylar region Significant reveal differences within lustre, expansion.Citation: Lemus-Barrios H., Barrios D., García-Beltrán J. A., Arias S. & Majure L. C. 2021: Taxonomic implications (Cactaceae) Cuba. – Willdenowia 51: 91–113.Version record first published online on 5 April 2021 ahead inclusion issue.