Bryophytes213-page3

Bryophytes213-page3 - Mosses attach to their substrate with...

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Bryophytes - 3 Phylum - Bryophyta (Mosses) Main Recognition Features Radially symmetrical Gametophyte generation is dominant Phyllodes ("leaves") have a midrib (costa) Rhizoids are multicellular Sporangium is a capsule elevated by a stalk (seta) above the gametophyte Mosses typically have radial symmetry. Mosses can be erect or prostrate with the axis along the substrate. The gametophyte has a stem-like axis with spirally arranged "leaves", which are properly called phyllodes. Leaves have a costa, or midrib that provides support, but does not conduct water or nutrients.
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Unformatted text preview: Mosses attach to their substrate with multicellular rhizoids. Mosses are found in a range of habitats, although moist and shady habitats are more common. Some mosses are found on rocks and in arid locations. As mentioned, mosses form huge masses in bogs throughout the world, and are the predominant vegetation in many arctic and alpine areas. Mosses are often epiphytes. Mosses absorb water and nutrients through their surface cells. Like most Bryophytes, mosses can desiccate, or dehydrate, for long periods without permanent damage....
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This note was uploaded on 01/08/2012 for the course BIO 213 taught by Professor Makina during the Fall '09 term at SUNY Stony Brook.

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