| 词条 | Cyathea decrescens |
| 释义 |
| name = Cyathea decrescens | status = | image = | image_caption = | regnum = Plantae | divisio = Pteridophyta | classis = Pteridopsida | ordo = Cyatheales | familia = Cyatheaceae | genus = Cyathea | subgenus = Cyathea | sectio = Alsophila | species = C. decrescens | binomial = Cyathea decrescens | binomial_authority = Mettenius | synonyms =
}} Cyathea decrescens is a species of tree fern endemic to Madagascar. The trunk is erect, 2–3 m tall and 10–12 cm in diameter. It usually has characteristic elliptical scars caused by fallen stipe bases. Fronds are bipinnate and 1-1.5 m long. The fronds may be densely pubescent and the lower pinnules are sometimes separated from the others as well as being reduced. The rachis and stipe are brown in colouration and bear narrow, dark brown scales. Sori are large, round and covered by fragile, brown indusia. References
2 : Cyathea|Endemic flora of Madagascar |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。