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.
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)
Trees are rare, and almost restricted to Pistacia, Celtis and Dodonaea, with poplars, and the date palm.
Farther east and north comes the Turkestan pine (Picea Schrenkiana), while at lower levels there grow willows, black and white poplars, tamarisk, Celtis, as well as Elaeagnus (wild olive), Hippophae rhamnoides (sallow thorn), Rubus fructicosus (blackberry), Prunus spinosa (blackthorn) and P. A rmeniaca (apricot).