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The family includes the world's tallest tree ferns, which reach heights up to 20 m. They are also very ancient plants, appearing in the fossil record in the late Jurassic, though the modern genera likely appeared in the Cenozoic. Cyatheaceae are the largest family of tree ferns, including about 640 species. [1]
Lauri Holts, the Parks and Open Spaces ecologist for the city of Eugene, said this red-brown aquatic fern, called Azolla, is often an attention-grabber for Eugenians who notice the ponds' change.
Tree ferns are arborescent (tree-like) ferns that grow with a trunk elevating the fronds above ground level, making them trees. Many extant tree ferns are members of the order Cyatheales , to which belong the families Cyatheaceae (scaly tree ferns), Dicksoniaceae , Metaxyaceae , and Cibotiaceae .
Dicksonia is a genus of tree ferns in the order Cyatheales. It is regarded as related to Cyathea, but is considered to retain more primitive traits, dating back at least to the Jurassic and Cretaceous periods.
Sphaeropteris excelsa is cultivated as an ornamental tree. It requires a neutral to slightly acidic soil [6] rich in organic matter. The soil must be moisture retentive but well drained. [5] The tree fern will suffer if left to stand in waterlogged soil. Sphaeropteris excelsa requires high humidity and either high rainfall or frequent watering ...
The fern crown group, consisting of the leptosporangiates and eusporangiates, is estimated to have originated in the late Silurian period 423.2 million years ago, [4] but Polypodiales, the group that makes up 80% of living fern diversity, did not appear and diversify until the Cretaceous, contemporaneous with the rise of flowering plants that ...
Where the Red Fern Grows is a 1961 children's novel by Wilson Rawls about a boy who buys and trains two Redbone Coonhounds for hunting. [1] It is a work of autobiographical fiction based on Rawls' childhood in the Ozarks .
The young opening fronds of many species are usually tinged with red. Blechnaceae is a family of ferns in the order Polypodiales, with a cosmopolitan distribution. Its status as a family and the number of genera included have both varied considerably.