Commercial release of a new hybrid 'Chiba' P. maximowiczii x fastigiate P. nigra (backcross). Developed by Allan Wilkinson, it has a narrow fastigiate form to replace the rust infected Lombardy poplar. 'Chiba' refers to Dr. Shigeru Chiba of the Japanese Oji Pulp & Paper Company which supplied the P. maximowiczii parent that is unpalatable to rabbits and possums. Leaves develop yellow autumn colour in May and remain rust free. Cuttings 40cm, Rooted topped @ 1m.

P. deltoides x yunnanensis. Broadly columnar, deciduous. Very vigorous. Not suitable for exposed sites due to large leaf size. Better in gullies & valley floors. Later yellow autumn colouring than other hybrid poplars. not very frost hardy. Widely used in western and northern regions, possum resistant. Timber density 360kg/m3, equal to P. radiata. Cuttings 40cm, Rooted topped @ 1m.

P. x euramericana. P. deltoides x P. nigra. Broadly columnar, deciduous. Needs summer rainfall for maximum growth. Has grown a little slower than the NZ series. The golden yellow autumn colour is earlier than the others. Cuttings 40cm, Rooted topped @ 1m.

N.W. USA. Broadly columnar, deciduous. Vigorous, strong root system for erosion control, can sucker if no grazing. Balsam scent in spring, yellow leaves in autumn. Possum resistant, withstands Southland winds. Selected clone from Belgium released 1978. Cuttings 40cm, Rooted topped @ 1m.