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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.
Sceptridium dissectum leaves are a light green during the spring and early summer, with the leaves becoming deciduous in late summer. The leaves usually turn a bronze color in late fall through winter. The grape like sporangia range from green to yellow. The petiole or stalk of the plant is green from top to bottom and glabrous as is the ...
Polypodium glycyrrhiza, commonly known as licorice fern, many-footed fern, and sweet root, is a summer deciduous fern native to northwestern North America, where it is found in shaded, damp locations. Spores are located in rounded sori on the undersides of the fronds, and are released in cool weather and high humidity. [1]
The leaves are monomorphic and pinnately compounded; they can be between 10 and 40 cm (3.9-15.7 in) long and 7.6-15.3 cm (3–6 in) wide. [4] [5] [6] The branching pattern appears to be opposite, but upon close observation it is clearly a slight alternate pattern. The leaf veins are for the most part unbranched, although some branching can be ...
The name "walking fern" derives from the fact that new plantlets grow wherever the arching leaves of the parent touch the ground, creating a walking effect. Both have evergreen, undivided, slightly leathery leaves that are triangular and taper to a thin point. On the bottom of the leaves, sori, or spore-bearing structures, cluster along the veins.
In ferns, the sori form a yellowish or brownish mass on the edge or underside of a fertile frond. In some species, they are protected during development by a scale or film of tissue called the indusium ( pl. : indusia ), which forms an umbrella-like cover.
An annulus in botany is for ferns an arc or a ring of specialized cells on the sporangium. These cells are arranged in a single row, and are associated with the release or dispersal of spores. In mosses it is a ring of cells around the tip of the sporangium. In flowers it is a ring of hairs within the flower tube.
Rattlesnake fern has separate fertile and sterile leaves, when present the sterile leaf arises halfway up the stalk and the fertile leaf exists at the tip. The spores are shed in late spring. Like other ferns rattlesnake fern undergoes alternation of generations and the form described in this article is the sporophyte .