Plenasium banksiifolium
{{Short description|Species of fern}}
{{Speciesbox
| image = Gardenology.org-IMG 0804 rbgs10dec.jpg
| image_caption = Plenasium banksiifolium
| taxon = Plenasium banksiifolium
| authority = (C.Presl) C.Presl
| synonyms =
{{Species list
|Asplenium aureum|Blume
|Nephrodium banksiifolium|C.Presl
|Nephrodium bromeliifolium|C.Presl
|Osmunda banksiifolia|(C.Presl) Kuhn
|Osmunda banksiifolia var.bromeliifolia|(C.Presl) Kuhn
|Osmunda bromeliifolia|(C.Presl) Copel.
|Osmunda haenkeana|C.Presl
|Osmunda oxyodon|Miq.
|Osmunda presliana|J.Sm.
|Plenasium aureum|(Blume) C.Presl
|Plenasium bromeliifolium|(C.Presl) C.Presl
|Plenasium oxyodon|(Miq.) A.E.Bobrov
}}
}}
{{Commonscat|Plenasium banksiifolium}}
Plenasium banksiifolium is a fern in the family Osmundaceae. The genus Plenasium is recognized in the Pteridophyte Phylogeny Group classification of 2016 (PPG I); however, some sources place all Plenasium species in a more broadly defined Osmunda, treating this species as Osmunda banksiifolia. It is native along the Pacific coast of Asia, being found in the Kamchatka Peninsula, the Ryukyu Islands, Japan, southeast China, Taiwan, the Philippines, Borneo, Sulawesi and Java. P. banksiifolium, which can reach a height of 1.5 m, is the largest species in the genus and has ornamental value.{{ Cite web |url = https://www.iplant.cn/info/Osmunda%20banksiifolia?t=z |title =粗齿紫萁|publisher = iPlant.cn, Flora Reipublicae Popularis Sinicae |language = zh }}
Description
The appearance of the fertile pinnae are very different from that of the sterile pinnae, the fertile pinnae are curled. The sporangia can also grow on the vegetative pinnae immediately above and below the fertile pinnae, with a compact shape; so we might say that P. banksiifolium has three types of pinnae: fertile, sterile, and semi-fertile. The young opening sterile pinnae are red, the fertile pinnae are mustard yellow at first, then turn green and finally reddish brown. The fertile pinnae can reach more than ten pairs.
File:粗齒革葉紫萁 - 溪頭自然教育園區 Plenasium banksiifolium - Xitou Nature Education Area, Taiwan 20220705193051 04.jpg|Sporophylls and vegetative pinnae
File:粗齒革葉紫萁 - 溪頭自然教育園區 Plenasium banksiifolium - Xitou Nature Education Area, Taiwan 20220705193051 07.jpg|The sporangia on the vegetative pinnae
File:粗齒革葉紫萁 - 溪頭自然教育園區 Plenasium banksiifolium - Xitou Nature Education Area, Taiwan 20220712183509 02.jpg|Young frond
File:粗齒革葉紫萁 - 溪頭自然教育園區 Plenasium banksiifolium - Xitou Nature Education Area, Taiwan 20220705193051 13.jpg|Young frond
File:粗齒革葉紫萁 - 溪頭自然教育園區 Plenasium banksiifolium - Xitou Nature Education Area, Taiwan 20220705193051 16.jpg|Vegetative pinnae
File:粗齒革葉紫萁 - 溪頭自然教育園區 Plenasium banksiifolium - Xitou Nature Education Area, Taiwan 20220705193051 17.jpg|Veinlets forked
File:粗齒革葉紫萁 - 溪頭自然教育園區 Plenasium banksiifolium - Xitou Nature Education Area, Taiwan 20220705193051 21.jpg|Rhizome
File:粗齒革葉紫萁 - 溪頭自然教育園區 Plenasium banksiifolium - Xitou Nature Education Area, Taiwan 20220705193051 01.jpg|Plant
References
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{{Taxonbar|from1=Q69465733|from2=Q7107255|from3=Q17169221}}
Category:Flora of Kamchatka Krai
Category:Flora of the Ryukyu Islands
Category:Flora of Southeast China
Category:Flora of the Philippines
{{Polypodiidae-stub}}