Leptopteris References Leptopteris fern genus Ask Anything Homework Help Written by The Information Architects of Encyclopaedia Britannica The Information Architects maintain a master list of the topics included in the corpus of Encyclopædia Britannica, and create and manage the relationships between them. The Information Architects of Encyclopaedia Britannica Britannica AI Ask Anything Learn about this topic in these articles: fern/ Annotated classification…thick-walled cells; 6 genera (Claytosmunda, Leptopteris, Osmunda, Osmundopteris, Plenasium, and Todea) and 20 modern species, distributed nearly worldwide. Order Hymenophyllales Family Hymenophyllaceae (filmy ferns) Read More…thick-walled cells; 6 genera (Claytosmunda, Leptopteris, Osmunda, Osmundopteris, Plenasium, and Todea) and 20 modern species, distributed nearly worldwide. Order Hymenophyllales Family Hymenophyllaceae (filmy ferns) Read MoreOsmundaceaeferns—Osmunda, Todea, and Leptopteris—the family contains about 20 species; 5 to 10 extinct genera date from the Late Permian Period (about 260 million to 251 million years ago). Thamnopteris and Zalesskya are the earliest known members of the family. The Osmundaceae family is characterized by spore-producing structures (sporangia)… Read Moreferns—Osmunda, Todea, and Leptopteris—the family contains about 20 species; 5 to 10 extinct genera date from the Late Permian Period (about 260 million to 251 million years ago). Thamnopteris and Zalesskya are the earliest known members of the family. The Osmundaceae family is characterized by spore-producing structures (sporangia)… Read More
