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Polytrichaceae is a common family of mosses. Members of this family tend to be larger than other mosses with a thickened central stem and a rhizome. The leaves have a midrib that bears photosynthetic lamellae on the upper surface. Species in this group are dioicous. Another characteristic that identifies them is that they have from 32 to 64 peristome teeth in their sporangium.
| Polytrichaceae
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| Polytrichum commune | |
Scientific classification 
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| Kingdom: | Plantae |
| Division: | Bryophyta |
| Class: | Polytrichopsida Doweld |
| Order: | Polytrichales M. Fleisch. |
| Family: | Polytrichaceae Schwägr. |
| Genera | |
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See text. | |
class Polytrichopsids
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| The phylogenetic position of the Polytrichaceae among the eight classes of mosses, based on inferences from DNA sequence data.[1][2] |
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