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Anatomy, age and growth was measured on more than three individual specimens collected in 2013–2015. The material collected in the field has been stored in 40% ethanol to avoid drying artefacts. Each species was carefully labeled. The material has been sectioned without embedding and double stained with Safranin/Astrablue with the principal goal to determine the maximum plant tissue age and the stem anatomy just above ground. Therefore, all the sections are anatomically, taxonomically and ecologically comparable. Information on each species is given.