Key to Poplars and Willows
in New Zealand
Version 1.0.5
'Rotorangi'
- 0. Poplar or Willow?
- Looks like a poplar -> Poplar - 1. Crown shape
- Narrow crown (or uncertain) -> 2. Bark
- Bark is rough -> 4. Bark and form
- Bark finely ribbed, ribs roughly parallel -> 7. Crown and dominance
- Strong apical dominance, less likely to have heavy branches, leaves ovoid, more rust resistant, smaller tree -> 'Rotorangi'
Populus deltoides x P. ciliataNZ 5027
‘Rotorangi’ is a P. x asiamerica hybrid, resulting from a 1983 NZ cross between P. deltoides and P. ciliata. It was first released commercially in 2011.
Identification
Strong apical dominance.
Retains its leaf longer than other del-ciliata clones.
Typical uses, site requirements, pest and disease resistance.
‘Rotorangi’ is suitable for general soil conservation use, particularly in drier eastern regions. It copes better than other deltoides-ciliata clones in windy sites including coastal sites.
‘Rotorangi’ has medium-high rust resistance.
Performance in trials
‘Rotorangi’ in a close-planted trial at Lawrence had a mean height of 15.3 (25.5) m and DBH of 28.9 (42.4) cm after 12 (24) years. It is not as vigorous as the other deltoides × ciliata clones and less likely to develop heavy branches.
