Morphological evaluation of the Pinus kesiya complex (Pinaceae)

The main aim of this study is to compare all taxa from the Pinus kesiya complex and related P. tabuliformis using statistical, ordination and discrimination techniques focusing on ten most discriminating morphological traits. Special emphasis was placed on the recently described taxa Pinus densata s...

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Bibliographic Details
Published in:Plant systematics and evolution 2014-02, Vol.300 (2), p.273-285
Main Authors: Businský, Roman, Frantík, Tomáš, Vít, Petr
Format: Article
Language:English
Subjects:
Biological taxonomies
Biomedical and Life Sciences
Geographic distribution
Geographical distribution
Geography
Hybridity
hybrids
leaves
Life Sciences
Morphology
Ordination
Original Article
parents
Pine trees
Pinus
Pinus densata
Pinus kesiya
Pinus yunnanensis
Plant Anatomy/Development
Plant Ecology
Plant Sciences
Plant Systematics/Taxonomy/Biogeography
Population (statistical)
Population characteristics
Population distributions
Population geography
Quantitative traits
Statistical analysis
Taxa
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Summary:The main aim of this study is to compare all taxa from the Pinus kesiya complex and related P. tabuliformis using statistical, ordination and discrimination techniques focusing on ten most discriminating morphological traits. Special emphasis was placed on the recently described taxa Pinus densata subsp. tibetica and P. × naxiorum (=P. yunnanensis × P. densata). Population comparisons of the particular main geographic distribution areas of Pinus kesiya, P. densata subsp. tibetica and P. yunnanensis were also conducted separately within each mentioned taxon using the same data. Pinus densata subsp. tibetica proved to be sufficiently morphologically differentiated from subsp. densata as well as from other species of the P. kesiya complex and P. tabuliformis. The recently originating hybrid P. × naxiorum appears to be intermediate between its parents. The unique shrubby taxon P. densata var. pygmaea is clearly closer to P. densata than to P. yunnanensis, to which it has been classified in Chinese floras. Populations of four distant Pinus kesiya geographic distribution areas lack substantial differences that would support the recognition of infraspecific taxa such as subsp. insularis or var. langbianensis. Pinus yunnanensis is very similar to P. kesiya, with only one trait, leaf length, being significantly different.
ISSN:0378-2697
1615-6110
2199-6881
DOI:10.1007/s00606-013-0880-0