兴安松分类地位初步探讨

Taxonomical Position of Pinus hingganensis H.J.Zhang

新种兴安松（ＰｉｎｕｓｈｉｎｇｇａｎｅｎｓｉｓＨ．Ｊ．Ｚｈａｎｇ）１９８５年被命名后，大兴安岭五针松即成３种。为探求三者亲缘关系，以比较形态学、化学、生物化学以及生态学、地理学等多种方法，对三者进行了比较系统地研究。初步结果表明：①兴安松非大兴安岭特有成份，也不宜做为分类学的一个物种；②偃松（Ｐ．ｐｕｍｉｌａ）是个多型种，兴安松可能只是它的一直立性饰变，现做为传统分类学的一变型，学名重组合为Ｐ．ｐｕｍｉｌａｆ．ｈｉｎｇｇａｎｅｎｓｉｓ。

There are three species of Subsect. Cembrae of Pinus in Daxing'an Mountains of China, since have been named the new species P. hingganensis H. J. Zhang in 1985 These species were systematically studied by means of comparative morphology, chemistry, biochemistry, ecology and geography etc. for investigating taxonomical position of P. hingganensis and consanguinity of these three species. The preliminary results show that P. hingganensis is not a endemism for Daxing'an Mountains and should not be a species for taxonomy; P. pumila is a very polytypic species and P. hingganensis is only a ecophenes or a habitat modification (mod. arboreus) of it; and should be named P.pumila f. hingganensis Comb. nov..