Britain, Europe, Caucasus & Alborz Mts. (Iran). Broadly columnar, deciduous tree with stout greenish-grey shoots with jet black buds. Leaves with 7-13 coarsely serrate leaflets, late into leaf & early to fall. Flowers before the leaves, developing into bunches of 'keys'. Vigorous grower, best on deep moist to wet soils but tolerates much drier soils, enjoys limestone. Valuable light coloured hardwood timber for tool handles, sports goods, and joinery. Steams and bends well. Coppices readily, producing straight poles and rods. Great firewood, burns cut green.

China. Conical, deciduous. Long fossil history. Found growing in NW Hupeh in 1941. New seed import brings wider genetic base to NZ. Cypress-like timber is light, strong and durable. Prefers damp sites, deep rooted shade tree for streamsides.

N America. A hybrid of P. orientalis x P. occidentalis. Broadly columnar, deciduous. Trunk often continuous right through the crown. Bark flakes in large plates. Leaves up to 25cm across. Withstands city pollution. Good furniture timber.

P. deltoides x nigra (euramericana) DNA tested, narrow crown, vigorous vertical growyh from top of pole, Drought tolerance between Veronese and Otahoua, withstands strong winds. Originally selected & trialled 20+ years ago as 'Highden'. Cuttings 40cm. Rooted topped @ 1m.