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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Kaulfussia ： ウィキペディア英語版 Christensenia (plant) :''For the broad-nosed weevil genus, see ''Christensenia (beetle). ''Christensenia'' is a genus of ferns in the botanical family Marattiaceae. The genus is confined to the Indo-Malayan region. The basal chromosome number for this genus is 2n=80. ''Christensenia'' is unique in the Marattiaceae, because of its reticulate venation, palmately arranged leaves and radial synangia. ''Christensenia'' produces enormous amounts of spores, up to 7,000 spores per sporangium. The presence of a radial synangium is an archaic character, very similar to some of the fossil Asterothecaceae/Psaroniaceae, such as ''Scolecopteris''. ''Christensenia'' itself has no fossil record. ==Species== After the 1993 revision by Rolleri, only two species and one variety are recognized: * ''Christensenia aesculifolia'' (Blume) Maxon (type species) * * ''Christensenia aesculifolia'' var. ''korthalsii'' * ''Christensenia lobbiana'' (de Vriese) Rolleri 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Christensenia (plant)」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.