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題 名 | Three New Species of Asarum (Section Heterotropa) from Taiwan=臺灣產細辛屬杜蘅組三個新種 |
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作 者 | 呂長澤; 王震哲; | 書刊名 | Botanical Studies |
卷 期 | 50:2 2009.04[民98.04] |
頁 次 | 頁229-240 |
分類號 | 373.92 |
關鍵詞 | 細辛屬; 馬兜鈴科; 染色體數目; 杜蘅組; 花粉; 臺灣; Asarum; Aristolochiaceae; Chromosome number; Heterotropa; Pollen; Taiwan; |
語 文 | 英文(English) |
中文摘要 | 本文報導台灣產細辛屬杜蘅組植物 (Asarum sect. Heterotropa) 的三個新種: 插天山細辛 (A. chatienshanianum)、大武山細辛 (A. tawushanianum) 及神秘湖細辛 (A. villisepalum)。除新種特徵描述外並提供手繪圖與彩色照片以資辨識。文中並檢視此三個新種的體染色體數目及花粉粒表面的微細構造。其中體染色體數目三種均為2n = 24 ,而花粉粒的外壁除插天山細辛為由穿孔的小單元所組成外,其餘兩種皆為條紋狀穿孔且其上具有大型瘤突。在形態上,插天山細辛與神秘湖細辛與大花細辛(A. macranthum) 在植物體外形上相似,但是可由花部特徵加以區分: 插天山細辛具有黃綠色的花,萼筒為長圓柱形,且花柱具有二裂的角狀附屬物; 神秘湖細辛的花為褐紫紅色,萼裂片上覆有白色長柔毛,萼筒內壁上半部具有12 條縱向隆起,而下半部則有24 條。大武山細辛則與下花細辛(A. hypogynum) 較為相似,然而,可由其壓扁狀圓柱形的萼筒與花較小且呈紫紅色,而與之區別。文末附上台灣產細辛屬植物所有分類群的檢索表,供物種間比較及鑑定之用。 |
英文摘要 | Three new species of Asarum L. sect. Heterotropa: A. chatienshanianum C. T. Lu & J. C. Wang, A. tawushanianum C. T. Lu & J. C. Wang, and A. villisepalum C. T. Lu & J. C. Wang, from Taiwan are described and illustrated. The somatic chromosome number and micromorphology of pollen grains of all of them were also examined. The somatic chromosome number in all three species is 2n=24. The tectum of the pollen is rugulate-perforate with large supratectate warts in A. tawushanianum and A. villisepalum but composed of perforated subunits in A. chateinshanianum. Asarum chatienshanianum and A. villisepalum are similar to A. macranthum Hook f. in gross morphology, but differ in floral morphology. Asarum chatienshanianum has greenish yellow flowers, a longer cylindrical calyx tube and the apex of the styles is bilobed. Asarum villisepalum is distinguished by dark maroon flowers, the densely white villous adaxial surface of the calyx lobes, and the internal surface of the calyx tube with 12 and 24 longitudinal ridges on the upper and lower part respectively. Asarum tawushanianum resembles A. hypogynum Hayata, but is distinguishable in having a short cylindrical calyx tube and smaller dark purple flowers. Descriptions, illustration and a synoptic key are provided for comparison with other species of Asarum in Taiwan. |
本系統中英文摘要資訊取自各篇刊載內容。