The order Cyatheales, which includes most tree ferns, is a taxonomic order of the fern class, Polypodiopsida. [2] No clear morphological features characterize all of the Cyatheales, but DNA sequence data indicate the order is monophyletic.

Tree fern, any of a group of relatively primitive ferns in the order Cyatheales, most of them characterized by ascending trunklike stems and an arborescent (treelike) habit. Tree ferns are conspicuous plants of humid tropical forests around the world.

A tree fern near Belles, Dominica Alsophila sp. tree ferns overlooking a valley in Misamis Oriental, Philippines. 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, …

The Cyatheaceae are a family of ferns, the scaly tree ferns, one of eight families in the order Cyatheales in the Pteridophyte Phylogeny Group classification of 2016 (PPG I). [1]

Order: Cyatheales; Family: Cyatheaceae, Dicksoniaceae; Genus: Cyathea, Dicksonia; Species: about 500 species of Cyathea; about 25 species of Dicksonia

CYATHEALES — TREE FERNS. The Cyatheales are a group of over 700 species in eight families (Table 4.1). Stems may be arborescent or rhizomatous, bearing hairs or prominent scales. Sori are marginal or abaxial, indusiate or exindusiate. Spores are trilete, and gametophytes are green and cordate.

2013年5月13日 · Cyatheales: The tree fern clade. Along with the Podypodiales and Salviniales, the Cyatheales are one of the main lineages within the “Core Leptosporangiates”. It is thought that these lineages began to diverge around 220mya – 211 mya.

Tree fern, any of a group of relatively primitive ferns in the order Cyatheales, most of them characterized by ascending trunklike stems and an arborescent (treelike) habit. Tree ferns are conspicuous plants of humid tropical forests around the world.

Tree ferns are a well-established clade within the leptosporangiate ferns dominating the order Cyatheales (Korall et al., 2006; Christenhusz et al., 2011).

Cyatheaceae is a family of ferns in the order Cyatheales, which also includes families such as Dicksoniaceae and Culcitaceae. The Cyatheaceae family is further divided into four subfamilies: Alsophilarioideae, Cyatheoideae, Loxsomatoideae, and Sphaeropteridoideae.