Systematics, Phylogeny and Evolution of Dietes (Iridaceae)

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Abstract
Dietes is a member of Iridaceae-Iridoideae and is probably the most primitive member of the Old World tribe Irideae. It shares characteristics of both Iris and the African genus Moraea and is most likely close to the ancestral stock that gave rise to these more specialized genera. Dietes comprises 6 spp., 5 African and 1 remarkable disjunct on Lord Howe Island between Australia and New Zealand, D. robinsoniana. The South African D. bicolor appears more closely related to D. robinsoniana than to the other African species, and these 2 share several characters primitive in the genus. The remaining 4 African species include the wide-ranging D. iridioides, which extends from the southern Cape to Ethiopia, and 3 more localized eastern southern African species [D. flavida, D. grandiflora and D. butcheriana]. [A key and distribution maps were presented.].

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