The class of the Bryophyta containing the orders Andreaeales and Takakiales. 1. Andreaea - A description of the genus. 2. Andreaea rupestris - A description of the species, its habitat and threats. 3. Andreaeopsida - An introduction to the Class. 4. Gleason Moss Collection: Andreaeaceae - Images of Andreaea rothii, A. rupestris, and A. subulata. 5. Life cycle of Takakia - Images of each stage of the life cycle. 6. Andreaeales - A description of the Order. 7. Takakia ceratophylla - A photograph of the male shoots with clusters of antheridia and female shoots with sporophytes. 8. Takakia ceratophylla - A photograph of a dehisced capsule. 9. Takakia ceratophylla - A microscopic image of the apex of the gametophyte and a separated antheridia surrounded by packets of sperm. 10. Takakia ceratophylla - A photograph of the gametophyte with antheridia and sporophyte.

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