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Polypodium virginianum : ウィキペディア英語版 | Polypodium virginianum
''Polypodium virginianum'', commonly known as rock polypody, rock cap fern, or common polypody, is a small evergreen species of fern native to the Eastern United States and Canada. It generally grows on rocks and occasionally on tree roots in nature. ==Description== ''Polypodium virginianum'' is a small rhizomatous fern with narrow leaves 8–40 cm long and 3–6 cm wide borne on smooth, scaleless petioles (3–15 cm). Leaves are evergreen, oblong and pinnatifid with acuminate tips. Large, circular sori are prominently featured on the underside of fertile fronds in late summer and autumn. Sporangia are intermixed with long brown glandular hairs.
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「Polypodium virginianum」の詳細全文を読む
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