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題名 | Polystichum Minutissimum sp. nov. (sect. Haplopolystichum, Dryopteridaceae) : The Smallest Polystichum Found in a Karst Cave in China=微小耳蕨 (新種,半開羽耳蕨組) : 最小的耳蕨屬種類 發現於中國貴州一喀斯特岩洞 |
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作者 | 張麗兵; 何海; | 書刊名 | Botanical Studies |
卷期 | 50:3 2009.07[民98.07] |
頁次 | 頁353-358 |
分類號 | 378.13 |
關鍵詞 | 洞穴植物; 中國; 鱗毛蕨科; 貴州; 微小耳蕨; 最小的耳蕨; 半開羽耳蕨組; Cave flora; China; Dryopteridaceae; Guizhou; Polystichum minutissimum; Smallest polystichoid fern; sect. Haplopolystichum; |
語文 | 英文(English) |
中文摘要 | 本文描述了在中國貴州一喀斯特岩洞中發現的耳蕨屬半開羽耳蕨組 (Polystichum sect. Haplopolystichum) 一新種:微小耳蕨 (P. minutissimum),並提供線繪圖與彩色照片以資辨識。該新種是耳蕨屬中迄今發現的植株最小的種。微小耳蕨與另一發現於貴州南部石灰岩地區的荔波耳蕨 (P. liboense) 最接近。兩者形態上最重要的區別是,微小耳蕨的羽片邊緣不具泌水器,而荔波耳蕨的羽片邊緣脈端具有明顯的泌水器。此外,微小耳蕨的葉片 (1.3-3.8 × 0.7-1.1 cm) 及羽片 (中部羽片 2.9-5.8 × 2.8-4.5 mm) 遠小於荔波耳蕨的葉片及羽片。微小耳蕨是適應於岩洞洞口的潮濕而陰冷的特殊生境的種類,因而可能對環境變化特別敏感,其生境應予以保護。 |
英文摘要 | Polystichum minutissimum (sect. Haplopolystichum, Dryopteridaceae) from a karst cave in southern Guizhou, China, is described as new. Polystichum minutissimum is the smallest species in the genus. It is morphologically most similar to P. liboense, a species also described from a limestone area in southern Guizhou, but differs from P. liboense in lacking hydathodes near the margin of the pinnae. Additionally, P. minutissimum has much smaller lamina (1.3-3.8 × 0.7-1.1 cm) and pinnae (middle ones 2.9-5.8 × 2.8-4.5 mm). In fact, it has the smallest lamina and pinnae in the genus. Polystichum minutissimum grows in cool, moist, and twilight conditions in a cave, where it can be extremely sensitive to environmental changes, thereby raising concern for its conservation. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。