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Summary
After having summarily described the ecological conditions of the «Montagna della Duchessa» the author lists the plants collected in this area by him and earlier by Martelli and Anzalone. Notes on the geographical distribution of some species in the most important mountains of Central Italy and critical remarks on the taxonomy of some plants are added to the list. Some taxa must be regarded as having been found for the first time in the Abruzzi.
On the basis of the biological spectrum and of the percentage of the geographical elements, the author takes into account the ecological and phytogeographical features of this flora and points out its affinity with the flora of the lands with an arctic climate.
The author describes the commonest plant-communities, by means of statistical investigations, lists of plants with frequency of each taxa, and field notes. Finally he takes into consideration some peculiar features of the flora of this area.
