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''Caldesia'' is a genus of aquatic plants. It includes three living species widespread across Europe, Asia, Africa and Australia.〔(Kew World Checklist of Selected Plant Families )〕〔(Altervista Flora Italiana, Mestolaccia minore, Parnassus Leaved Water Plantain, ''Caldesia parnassifolia'' )〕〔(Flora of China, v 23 p 87, 泽薹草属 ze tai cao shu ''Caldesia'' )〕 The genus "has an extensive Oligocene through Pleistocene fossil record in Eurasia," and has been found in fossil strata of the United States (Idaho and Vermont) as well. Ten fossil species have been described for the genus. ==Description== Leaves all basal, floating or aerial, ovate to elliptical, cordate or subcordate. Flowers hermaphrodite, in racemes or panicles. Stamens 6(-11). Carpels few or numerous in a single whorl, free, each with 1 ovule; styles subventral. Fruitlets drupaceous, with woody endocarp and spongy exocarp, swollen, with a short subventral beak, smooth or with tubercles or spines. ==Selected species== * ''Caldesia brandoniana'' † * ''Caldesia grandis'' Sam. - Assam, Bangladesh, southern China * ''Caldesia oligococca'' (F.Muell.) Buchanan * *''Caldesia oligococca ''var''. acanthocarpa'' (F.Muell.) Hartog - Queensland, Northern Territory (of Australia) * *''Caldesia oligococca ''var''. echinata'' Hartog - western Africa from Mali to Chad, plus India, Pakistan, Sri Lanka, Thailand, Vietnam, Java * *''Caldesia oligococca ''var''. oligococca'' - Timor, Queensland * ''Caldesia parnassifolia'' (L.) Parl. - widespread across Europe, Asia, Africa, Queensland * ''Caldesia reniformis'' (D.Don) Makino - synonym of ''Caldesia parnassifolia'' 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「Caldesia」の詳細全文を読む スポンサード リンク
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