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Bolbitis heudelotii : ウィキペディア英語版 | Bolbitis heudelotii
''Bolbitis heudelotii'', also known as the African water fern, creeping fern, and Congo fern, is native to subtropical and tropical Africa, from Ethiopia west to Senegal; and down to northern South Africa.〔Germplasm Resources Information Network: (''Bolbitis heudelotii'' )〕 ==Description== ''Bolbitis heudelotii'', named for the botanical explorer of West Africa Jean-Pierre Heudelot (1802-1837),〔Kasselmann, Christel, ''Aquarium Plants'' (Krieger, Malabar, Florida) 2003 :157.〕 is an aquatic Polypody fern growing submerged in rivers and streams, attached to rocks or wood by the threadlike rootlets extending from its rhizomes. It has dark green, pinnate leaves 15–40 cm long and 15–25 cm broad. It grows submerged. The water in its native habitat is fast-moving over sandy or rocky bottoms, very clean, not very hard and slightly acidic. The roots cling to rocks and the sandy beds.
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