Bryophytes[1] - Characteristics of Each of the Phyla of...

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Characteristics of Each of the Phyla of Bryophytes: Mosses: While talking about bryophytes, how can we neglect Mosses? According to the website science.jrank.org” The mosses are the largest of the three classes in the plant phylum Bryophyta. They have been divided into three subclasses: the true mosses (Bryideae), the peat mosses (Sphagnideae), and the granite mosses (Andreaeideae). The familiar small, green, and "leafy" moss plant is known as the gametophyte”. Mosses can be found on soil, rocks, bark of trees, and in bogs or shallow streams. Mosses also lack Flowers, and leaves. Like all the other bryophytes they are Gametophyte dominant, according to the website perspective.com” It produces a sperm and an egg (the gametes) which unite, when conditions are right, to grow into the next generation: the sporophyte or spore-bearing structure”. The same website also states that” The moss sporophyte is typically a capsule growing on the end of a stalk called the seta . The sporophyte contains no chlorophyll of its own: it grows parasitically on its gametophyte mother. As the sporophyte dries out, the capsule releases spores which will grow into a new generation of gametophytes, if they germinate”. As we know that Bryophytes are non- vascular plants, which means that they lack the vascular tissues xylem and phloem. One special characteristic that makes Mosses better than other Bryophytes is described a website called science.jrank.org” Only mosses have a multicellular rhizoid, a root-like subterranean tissue that absorbs water and nutrients from the soil. Liverworts and hornworts have single celled rhizoids”.
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The same website also explains that “Mosses have radial symmetry, in that a cut down the long axis of an individual gives two similar halves” .Like other bryophytes Mosses are also small in height; their growth is more horizontal, as they are used to cover the ground in landscaping and e.t.c. Liverworts:
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This note was uploaded on 05/12/2008 for the course BIO 110 taught by Professor Mrs. during the Spring '08 term at Northern Virginia.

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Bryophytes[1] - Characteristics of Each of the Phyla of...

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