Athyrium anisopterum Christ 宿蹄蓋蕨 @ Lady Ferns ~ Athyrium :: 隨意窩 Xuite日誌
  • 名錄 NameList
  • Plant Taxonomy and Systematics PhD. student in NSYSU, Kaohsiung, Taiwan
    Major in Taxonomy of lady ferns, genus Athyrium, in Taiwan

  • 200607112030Athyrium anisopterum Christ 宿蹄蓋蕨

    Athyrium anisopterum Christ, Bull. Herb. Boissier 6: 962. 1898;T: Yunnan, Henry 10109 (HT: P;IT: MO, NY;ST: PE!);
    宿蹄蓋蕨
      Dryopteris thysanocarpa Hayata, Icon. Pl. Form. 4: 160, f. 100. 1914; Athyrium thysanocarpa (Hayata) Hayata, Icon. Pl. Form. 4: 160, f. 100. 1914;T: Taiwan, Bioritsu, Rokujodaisan, Mori s. n. Oct. 1908.
      Rhizome short erect. Stipes tufted, green or stramineous, 5-30 cm long, scales pale brown, narrow lanceole on the stipe base. Lamina 10-50 cm long, herbaceous to papery, lanceolate to ovate, pinnate to bipinnified, glabrous, seldem with hairy scales (very narrow scales, less than 5 cells wide), on the adaxial or abaxial side of the leave. Pinnae with stalk (3-5 mm), 2 to 10 cm long, ca. 1 cm wide. Spines (setae) absent on the adaxial side of rachis, costae and midrib of the pinnule. Pinna-lobes widely obtuse and bearing obtuse teeth; in larger fronds the lowest pinna-lobes just become become pinnules and may themselves become somewhat lobed. Sori U-shaped or reniform, indusiate; indusia large, reniform to curved, sometimes short. Spores large, mid-grey-brown, rather widely perisporiate, with a ± unlobed perispore.
      根莖短直立。植株高25-80 公分,多半懸垂向下。葉柄叢生於根莖頂端,綠色或禾桿色,光滑無毛,長5-30公分,基部覆蓋淡褐色批針形鱗片。葉長10-50公分,寬5-20公分,草質或紙質,批針形或卵型,一回羽狀複葉至二回羽狀裂葉;葉軸光滑無毛,偶見毛狀鱗片(窄鱗片,寬度僅2-5個細胞)。羽片具柄(3-5 mm),長2-10公分,寬約1公分。羽軸近軸面無刺狀突起,光滑無毛,近軸面以及遠軸面偶有毛狀鱗片於其上;羽片一回淺裂或深裂,羽片頂端以及各裂片頂端圓鈍,邊緣圓鋸齒,大型個體可能在羽片基部有一至三對遊離小羽片,兩面均無毛。孢子囊群圓腎形或馬蹄形,跨越於小脈之上;孢膜圓腎形,大而明顯,邊緣齧齒狀或具指狀突起。

    沒有上一則|日誌首頁|沒有下一則
    回應