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New leaves typically expand by the unrolling of a tight spiral called a crozier or fiddlehead into fronds. [9] This uncurling of the leaf is termed circinate vernation. Leaves are divided into two types: sporophylls and tropophylls. Sporophylls produce spores; tropophylls do not. Fern spores are borne in sporangia which are usually clustered to ...
This plant is a large perennial fern with an ascending rhizome of about 50 cm high and covered with short rufous scales of about 1 mm long. The plant is bipinnate with long brownish petioles, and the petiole base is black and covered with short scales. The frond can reach 1.5 m in length, and the pinnae is about 8 cm long and 2 cm wide.
The names of fern frond parts (Davallia tyermannii) A fern (Dryopteris decipiens) with simple (lobed or pinnatifid) blades, the dissection of each blade not quite reaching to the rachis. A growing fern frond unfurling. Unfurling fiddlehead fern frond. A frond is a large, divided leaf. [1]
Angiopteris evecta, commonly known as the king fern, giant fern, elephant fern, oriental vessel fern, Madagascar tree fern, or mule's foot fern, is a very large rainforest fern in the family Marattiaceae native to most parts of Southeast Asia and Oceania. It has a history dating back about 300 million years, and is believed to have the longest ...
Rumohra adiantiformis is native to South America, the Caribbean, southern Africa, the Western Indian Ocean islands, Papua New Guinea, and Australasia. [2] Countries it is native to include such diverse places as Brazil and Colombia, [8] the Galápagos Islands, [9] the Greater Antilles in the Caribbean, Zimbabwe and South Africa [2] Australia, and New Zealand.
Adiantum (/ ˌ æ d i ˈ æ n t əm /), [1] the maidenhair fern (not to be confused with the similar-looking maidenhair spleenwort fern), is a genus of about 250 species of ferns in the subfamily Vittarioideae of the family Pteridaceae, [2] though some researchers place it in its own family, Adiantaceae.
Aglaomorpha quercifolia (synonym Drynaria quercifolia), commonly known as the oakleaf fern or oakleaf basket fern, is a species of Aglaomorpha in the family Polypodiaceae. Other common names for the fern are pakpak lawin , gurar , koi hin , ashvakatri , kabkab , kabkaban , or uphatkarul .
The fern fronds contain canal cells in the center of their surface scales that direct water to the epidermis of the fern leaves, allowing absorption. The ability of the fern fronds to unroll after exposure to desiccation is attributed to the large cells of the upper epidermis along the midrib of the frond that increase in width more than any ...