The principal trees are the oak, the valonia oak, the beech, ash, elm, plane, celtis, poplar and walnut, which give way in the higher regions to the pine and fir.
The provinces of Santa Fe, Cordoba and Santiago del Estero are only partially wooded; large areas of plains are intermingled with scrubby forests of algarrobo (Prosopis), quebracho-blanco (Aspido-sperma quebracho), tala (Celtis tala, Sellowiana, acuminata), acacias and other genera.
Pedunculata), walnut, nettle tree (Celtis australis, L.), Siberian elm (Zelkova crenata, Spach), and various kinds of poplar.
The vines whose fruit is intended for table use as grapes or raisins are trained on espaliers or on trees, especially the nettle-tree (Celtis ausiralis)
For a full list of Celtes's works see Engelbert Kliipfel, De vita et scriptis Conradi Celtis (2 vols., Freiburg, 1827); also Johann Aschbach, Die fruheren Wanderjahre des Conrad Celtes (Vienna, 1869); Hartmann, Konrad Celtes in Nurnberg (Nuremberg, 1889).