白蘭とSum paのrLaṅs氏

In this paper the writer aims to show that Pai-lan was the habitat of the rLaṅs clan of the Sum pa. He doubts the hitherto suggested hypothesis to identify the location of Pai-lan with the Tshaḥi ḥdam region. By pointing out the defects of the argument which led to this hypothesis, the writer proposes to place Pai-lan in Kung-chou 恭州 of Szechwan Province near Sung-p’an 松潘 and Mao-chou 茂州, which he thinks was in the vicinity of the present-day Tsa-ku 雑谷 (Tibetan Tsha kho). He re-examines the location of Pai-lan in relation to those of tribes other than the Sum pa and place-names mentioned in Chinese sources concerning Pai-lan, and confirms that his conclusion does not contradict the statements given in Chinese sources.Secondly, he aim to examine the clans which composed the Sum pa, and locate their habitats by using the Tibetan histories Deb ther rgya mtsho and rLaṅs Po ti bse ru. Above all, he shows that the rLaṅs clan held control of Sum yul, which included the whole Chin ch’uan 金川 district and P’an chou 潘州. The writer considers Tsha kho, namely Kung chou, as the center of the Sum yul, and also concludes that the lan of Pai-lan is the Chinese transliteration of Tibetan rLaṅs, while pai “white” was added to it by Chinese as an adjective descriptive of a characteristic of the clan. The detailed discussion of the word pai will be given on another occasion