Morphological evaluation of the Pinus kesiya complex (Pinaceae)

作者：Businsky Roman^*; Frantik Tomas; Vit Petr

来源：Plant Systematics and Evolution, 2014, 300(2): 273-285.

DOI：10.1007/s00606-013-0880-0

• Morphological variation
• Pinus densata subsp tibetica
• Pinus kesiya complex
• Taxonomy

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. x naxiorum (=P. yunnanensis x 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. x 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.

• 出版日期2014-2