Lady Ferns ~ Athyrium :: 隨意窩 Xuite日誌
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  • Plant Taxonomy and Systematics PhD. student in NSYSU, Kaohsiung, Taiwan
    Major in Taxonomy of lady ferns, genus Athyrium, in Taiwan

  • Figure form Sano et al. 2000. Phylogeny of the Lady Fern Group, Tribe Physematieae (Dryopteridaceae), Based on Chloroplast rbcL Gene Sequences. Molecular Phylogenetics and Evolution Vol. 15: 403–413.<br />

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    Figure form Schneider, H. et al. 2004. Ferns diversified in the shadow of angiosperms. Nature 428: 553-557.<br />
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    Figure from Pryer, K. M. et al. 2001. Horsetails and ferns are a monophyletic group and the closest living relatives to seed plants. Nature 490: 618-621.<br />

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    生物多樣性的保育工作需要分類學的研究作為基礎。植物多樣性的研究目的之一,在了解我們所賴以生存的環境中,所孕育植物種類以及分布與棲地之間的關係。

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    Athyrium reflexipinnum Hayata, Icon. Pl. Formos. 4: 234, f. 164. 1914.
    逆羽蹄蓋蕨

    Summer-green. Rhizome stout, ascending to erect, covered with persistent stipe bases; scales thin, rusty-brown, ovate-lanceolate, 2-3 mm long 0.5 mm broad. Stipe much shorter than lamina, tufted, slender, stramineous sometimes purplish, 3-20 cm long; lamina narrowly lanceolate, deeply bipinnatifid to bipinnate (basal pinnules free), 10-20 cm long, 3-6 cm wide; all except upper pairs of pinnae reflexed, 2-4 cm long, sessile; pinnules cut nearly to costa, obtuse, dentate, adaxial basal pinnule enlarged, herbaceous, glabrous, fertile even in small leaves; ultimate segments oblong to elliptic, serrate or sharply lobed at margin; very short spines present on the adaxial side of costae. Sori medial or basal on lower veinlets; indusia oblong, J-shaped or reniform; margins somewhat erose.

    Distribution: Taiwan, Japan, Shikoku and Kyushu (Yakushima), and S. Korea.

    Type: Taiwan

    200504091200Genus introduction

    Athyrium Roth 蹄蓋蕨屬

    Pseudocystopteris Ching  假冷蕨屬

    地生蕨類;根莖通常強壯且直立,少有長橫走(台灣僅日本蹄蓋蕨及假冷蕨具備此特徵)。鱗片薄,披針形或卵圓形,淺褐色至黑色具光澤。葉柄綠色、草桿色或紫色;基部具有兩分離維管束,在葉柄中部以上癒合成U字形。葉一回羽狀複葉至三回以上羽狀複葉;葉脈游離;葉軸及羽軸進軸面上的溝相通,部份種類葉軸、羽軸、小羽軸上具有刺狀構造。孢子囊群長橢圓或是圓形,通常跨脈生長。台灣約有24種,分布在海拔1000-3000公尺山區。

    Terrestrial ferns; rhizome usually stout and erect, rarely long creeping; scales thin, lanceolate or ovate and light brown, some narrow and black . Stipe green, stramineous, or purple, with 2 vascular strands at base and uniting into U-shaped strand at middle rachies; lamina pinnate to decompound; veins all free; rachis and costae grooved and connected on dorsal side, some species with spines on the dorsal side of rachies, costae and costulate. Sori oblong or round, usually crossing a veinlet, some species with Diplazium type. Indusia linear, J-shape or reniform. About 24 species in Taiwan, most species in Taiwan grown at altitude 1000 to 3000 m.

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