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Revision of the Genus Oreomyrrhis Endl. (Apiaceae) in Taiwan

台灣産山薰香屬之分類訂正

摘要


本文針對台灣産山薰香屬植物進行分類研究,結果將台灣産種類區分爲三種,均爲台灣特有種。先前於台灣植物誌中將台灣山薰香(Oreomyrrhis taiwaniana Masamune)併入爲山薰香(O.involucrata Hayata)之異名,在此處理爲獨立之兩分類群;另發現一新種一南湖山薰香(O.nanhuensis C.H.Chen &J.C.Wang)之異名,截至目前爲止,此新種僅發現於太魯閣國家公園內的南湖大山,生長於高海拔(約3,400至3,700公尺)的開闊碎石草地上。本研究顯示,小葉的羽狀裂瓣數目的形狀、緫苞片的形態、以及花的顔色,提供台灣産種類相當重要之分類依據。本文並提供種之檢索表,各分類群的描述、繪圖、地理分布及分類注釋。此外,並報導南湖山薰香的染色體數目爲n=6。

並列摘要


Based on a taxonomic study of the genus Oreomyrrhis in Taiwan three species are recognized, all endemic to Taiwan: O. involucrata Hayata; O. taiwaniana Masamune (previoLisly reduced to synonymy under 0. involucrata); and, O. nanhuensis C. H. Chen & J. C. Wang sp. nov. Oreoinyrrhis nanhuensis is so far known only from exposed gravelly grasslands on the high-altitudinal region (ca. 3,400-3,700 m) of Mt. Nanhutashan in Taroko National Park. The number and shape of pinnatifid-lobes of leaflets, morphology of involucral bracts, and color of flowers are shown to be the most useful characters for separating Taiwanese species. A key to taxa, discussion of taxonomic characters, description, illustration, geographical distribution, specimens examined, and taxonomic notes are provided for each taxon. The chromosome number of n=6 is observed for the new species 0. nanhuensis.

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