the objective of this work was to create a methodology of interactive keys from the reconstruction of published text keys. the general key of the book "árboles de cuba" (trees from cuba), in which the technique of building text keys through the traditional method is explained, was used as a model; in this book there are important tree and shrub genetic resources for forage and other usages, which served as basis. the text processor microsoft office word 2003 was used. many bibliographic materials were also reviewed, giving access to wide information about tree and shrub taxa for forage and other usages, which was compiled and arranged. the use of this methodology facilitates the completion of the bothersome table work presupposed by the use of keys built by the traditional method. it allows developing skills in the identification and characterization of plant resources and it can be used to reconstruct interactive keys of other biological groups dichotomously classified. the consultation of this material is recommended to all those specialists who are related to the activities of identification and characterization of plant biodiversity or other living beings; it is also recommended to edit the reconstructed keys for tree and shrub genetic resources for forage and other usages; as well as to create specialized software from reconstructed interactive keys based on this methodology.