Abstract
Three new species of Cyathea, two from Venezuela and one from Venezuela and the border region between Venezuela and Brazil, are here described: Cyathea alsophiloides, C. cylindrica, and C. lellingeriana. These species are endemic to the tepuis of the Guayana Shield and occur mainly at high elevations (1850–2555 m, although C. lellingeriana also grows down to 770 m). Descriptions, illustrations and mapped distributions are provided for each species, and their similarities to and differences from other species of the Hymenophyllopsis clade in Cyathea are discussed.