Gentiana bambuseti (Gentianaceae), a New Species from Taiwan

本文描述台灣產龍膽屬植物一新種－竹林龍膽(Gentiana bambuseti T. Y. Hsieh, T. C. Hsu, S. M. Ku & C.-I Peng)。本新種略似東亞產之筆龍膽(G. zollingerii Fawcett)，不同在於竹林龍膽下部莖單一而無葉，莖上部分枝；葉片基部非心形，葉緣具細粗糙狀軟骨邊；花較小，長約9-12 mm；萼裂片先端為芒狀漸尖。竹林龍膽具單一且無葉的下部莖，易與台灣其他龍膽物種區別。本文提供竹林龍膽的彩色圖版、線繪圖、分布圖以及花粉和種子的電顯圖；報導其體染色體數(2n=60)，並經由核型分析探討可能之多倍體起源。竹林龍膽相當稀有，目前僅知零星分布於中台灣阿里山山區海拔約1,400-1,700 m的竹林邊緣，受到人工採收竹筍的嚴重干擾。

關鍵字

染色體細胞學；竹林龍膽；筆龍膽；核型分析；新種；稀有植物；台灣；分類學

並列摘要

Gentiana bambuseti T. Y. Hsieh, T. C Hsu, S. M. Ku & C.-I Peng, a new species from Taiwan, is described and illustrated. This new species resembles G. zollingerii Fawcett, differing in the radical leaves not cordate, flowers shorter (ca. 9-12 mm long); branches from middle or above; lower half of stem simple and leafless; leaf margins cartilaginous and scabrescent; and apex of calyx lobes aristate-acuminate. This species occur spradically in the Alishan Range at 1,400-1,700 m altitude in central Taiwan. It is remarkably distinct from all congeners in Taiwan in the long, simple, leafless stem base. A somatic chromosome number of 2n=60 was determined and the karyotype was analyzed for G. bambuseti. A color plate, line drawings, distribution map, and SEM microphotographs of seeds and pollen are documented for this new species. Gentiana bambuseti is highly vulnerable to heavy disturbance during harvesting in the bamboo forests.

並列關鍵字

Chromosome cytology ； Gentiana bambuseti ； Gentiana zollingerii ； Karyotype analysis ； New species ； Rare species ； Taiwan ； Taxonomy

國際替代計量

Gentiana bambuseti (Gentianaceae), a New Species from Taiwan

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