s . ▁Unfortunately ▁se eds ▁of ▁that ▁proven ance ▁were ▁supplied ▁to ▁many ▁commercial ▁grow ers ▁in ▁the ▁ 1 9 7 0 s ▁in ▁the ▁United ▁Kingdom . ▁Se eds ▁s our ced ▁from ▁Neu qu en ▁in ▁Argentina ▁proved ▁the ▁hard iest . ▁A ▁selection ▁from ▁M alle co , ▁Chile , ▁which ▁is ▁the ▁proven ance ▁of ▁the ▁first ▁trees ▁plant ed ▁in ▁the ▁British ▁Is les ▁also ▁gave ▁good ▁hard iness ▁results . ▁It ▁has ▁also ▁been ▁plant ed ▁on ▁the ▁North ▁Pacific ▁Coast ▁of ▁the ▁United ▁States . ▁ ▁Ex perimental ▁plant ations ▁established ▁in ▁Wales ▁suffered ▁severe ▁damage ▁during ▁the ▁ 1 9 8 1 – 1 9 8 2 ▁cold ▁wave ▁that ▁swe pt ▁through ▁Britain . ▁ ▁Sub species ▁ ▁There ▁are ▁two ▁recogn ised ▁sub species ▁of ▁N . ▁ob li qua . ▁These ▁are : ▁▁ ▁N . ▁ob li qua ▁sub sp . ▁and ina ▁( F . M . V az quez ▁& ▁R . A . R od r .) ▁▁ ▁N . ▁ob li qua ▁sub sp . ▁val div iana ▁( Ph il .) ▁He en an ▁& ▁Sm issen . ▁ ▁N oth of ag us ▁macro car pa ▁was ▁once ▁also ▁considered ▁a ▁sub species , ▁as ▁F ag us ▁ob li qua ▁var . ▁macro car pa . ▁ ▁Hy br ids ▁▁ ▁N . ▁ob li qua ▁hy brid ises ▁with ▁Ra ul í ▁( N oth of ag us ▁al p ina )