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Osmundaceae (royal fern family) is a family of ferns containing four to six extant genera and 18–25 known species. It is the only living family of the order Osmundales in the class Polypodiopsida or in some classifications the only order in the class Osmundopsida.
Royal fern is a large perennial herb with stout ascending rhizomes that over many years build up a woody, trunk-like base covered by interwoven roots, 1 m or more high. The fronds, or leaves, arise directly from this rhizome and are very large, typically up to 120 cm but exceptionally as much as 400 cm long and 30-40 cm broad.
Corydalis cheilanthifolia, the fern-leaved corydalis [2] or fern-leaf corydalis, is a flowering plant in the family Papaveraceae. [ 1 ] [ 3 ] It is a perennial growing from rhizomes , native to western and central China.
The fertile foliage fronds are large and dark green, the smaller brown sterile nest fronds are clustered at their bases. Sori on the abaxial surface of the foliage frond of Aglaomorpha quercifolia. Basket ferns are characterized by the presence of two types of fronds, fertile foliage fronds and sterile nest fronds. The dark green foliage fronds ...
[4] [5] "Frond" is commonly used to identify a large, compound leaf, but if the term is used botanically to refer to the leaves of ferns and algae it may be applied to smaller and undivided leaves. Fronds have particular terms describing their components. Like all leaves, fronds usually have a stalk connecting them to the main stem.
The trunk of this species can grow to a height of 5 m or more. The stipes are persistent, spiny and purplish towards the base, and covered in brown shiny scales. Fronds are 1–3 m long and three-limbed.
Adiantum capillus-veneris, the Southern maidenhair fern, black maidenhair fern, maidenhair fern, [3] and venus hair fern, is a species of ferns in the genus Adiantum and the family Pteridaceae [4] with a subcosmopolitan worldwide distribution. It is cultivated as a popular garden fern and houseplant. [5]
Sometimes called the potato fern, this is a large fern with an edible fleshy rhizome that is used as a food source by some indigenous peoples. The East-Asian genus Christensenia is named in honor of the Danish pteridologist Carl Christensen is an uncommon fern with distinctive fronds resembling a horse chestnut leaf, hence the species ...
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