sentences:  In the lowlands further inland, above all in the marls and clay soils, field elms ("Ulmus minor") and poplar groves are more common, with occasional ashes and willows.At the bottom of granite valleys and on the siliceous riverbanks, there are very typical formations of ash with Pyrenean oak, especially at the foot of thin interior mountain ranges.The sheltered gorges of the Serranía de Cuenca have mixed riparian forests of lime and hazel trees, with ashes, willows and Wych elm ("Ulmus glabra").