L. Cockayne 
Hybridism in the forests of New Zealand
Cockayne L. (1929). Hybridism in the forests of New Zealand. Acta Forestalia Fennica vol. 34 no. 3 article id 7216. https://doi.org/10.14214/aff.7216
Abstract
The article gives examples of hybridization of forest tree and shrub species in the forests of New Zealand. According to the article, many of the 498 vascular plant species in the forest communities of the New Zealand region must be excluded from the standpoint of hybridism, because they belong either to genera of one species or are unable to cross owing to geographical or biological isolation. The hybrids are in most cases jordanons which cross, and may be more or less distantly related or closely related. The hybrids occur usually in polymorphic groups. Most of the hybrids in New Zealand are fertile. The hybrids can affect the forest communities in two ways; by effecting their composition or their structure. The article includes a list of hybrid groups.
Jubileum publication of professor Aimo Kaarlo Cajander.
Keywords
tree species;
hybrid;
polymorphism;
hybridization
Published in 1929
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