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Amauropelta noveboracensis, the New York fern, [3] is a perennial species of fern found throughout the eastern United States and Canada, from Louisiana to Newfoundland, but most concentrated within Appalachia and the Atlantic Northeast. New York ferns often forms spreading colonies within the forests they inhabit.
The fern has spores on the bottom of the fronds, contained in sori. Sori can be found aligned in rows on the underside of fertile fronds. They start as yellow, but as they mature, they turn brown and split. [13] The fern sporulates in summer and early fall. Rhizome sections are also viable offspring and can root themselves in new medium.
Linnaeus first gave the walking fern the binomial Asplenium rhizophyllum in his Species Plantarum of 1753. [12] In 1833, J.H.F. Link placed the species in a segregate genus, Camptosorus, because of the irregular arrangement of its sori (in contrast to the rest of Asplenium, where the sori are confined to the edge of veins). [13]
A sorus (pl.: sori) is a cluster of sporangia (structures producing and containing spores) in ferns and fungi. A coenosorus ( pl. : coenosori ) is a compound sorus composed of multiple, fused sori. Etymology
Coryphopteris simulata, synonym Thelypteris simulata, [2] is a species of fern native to the Northeastern United States. It is known by two common names: bog-fern and Massachusetts fern. It is often confused with the silvery spleenwort, New York fern, and the marsh fern due to similarities in shape and size. [3] [4]
Generally, the family is pantropical, but due to the distribution of Pteridium (the most widespread fern genus), Dennstaedtiaceae can be found worldwide. [4] Pteridium is a well adapted early successional genus, generally described as a weed because of its ease of spread.
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Fertile leaves of A. septentrionale showing brown sori on underside. Individual plants have an abundant number of leaves, forming dense tufts from a rhizome of about 1 millimetre in diameter, and sometimes mats on flat rocks. [2] [3] A. septentrionale is easily distinguished from other related ferns by its narrow blades, often forked at the tip ...