Plant collectors collectors such as William Lobb and Harold Comber introduced many trees and shrubs from South America which succeed in the mild Cornish climate. In fact several trees such as the Eucryphia cordifolia reach a comparable size to that in their native habitat and spread around from shoots growing off their root systems. The South American Nothofagus spp. are all fast growing and successful trees for the woodland garden at Tregrehan.
Tasmania and South Australia also provide much interest in the Gondwanaland Section at Tregrehan which is the area across the stream at the bottom of the valley. Different members of the Proteaceae such as Embothrium and Grevillea are prominent but rather fickle.
Keep a look out for a series of different Bromeliads at the bases of the large trees where by being dry in the winter they survive the frost and cold. There are quite a number of interesting conifers here including Fitzroya and Pilgerodendron which were received from the RBG Edinburgh as part of their Conifer Conservation Programme.