Approach to the floristic catalogue of the Dehesa of Somosierra and new records for the Community of Madrid (Spain)

This study represents an approach to the floristic catalogue of the Dehesa of Somosierra, in the northeast corner of the Community of Madrid. The collection of plant material has been carried out along different expeditions from April 2013 to October 2015. A total of 192 species and subspecies were identified belonging to 135 genera and 47 families. It is also highlighted that two specimens of Betula alba included as two singular trees of the Community of Madrid have been identified as Betula pendula subsp. fontqueri. Besides, it is worth noting that the species Myosotis debilis, Ornithogalum bourgaeanum, and Rubus vagabundus are cited for the first time in the Community of Madrid.