Polysporangiophyte
Spore-bearing plants with branched sporophytes / From Wikipedia, the free encyclopedia
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Polysporangiophytes, also called polysporangiates or formally Polysporangiophyta, are plants in which the spore-bearing generation (sporophyte) has branching stems (axes) that bear sporangia. The name literally means 'many sporangia plant'. The clade includes all land plants (embryophytes) except for the bryophytes (liverworts, mosses and hornworts) whose sporophytes are normally unbranched, even if a few exceptional cases occur.[1] While the definition is independent of the presence of vascular tissue, all living polysporangiophytes also have vascular tissue, i.e., are vascular plants or tracheophytes. Extinct polysporangiophytes are known that have no vascular tissue and so are not tracheophytes.
Polysporangiophyte | |
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Reconstruction of Aglaophyton, illustrating bifurcating axes with terminal sporangia, and rhizoids. | |
Modern polysporangiophyte, monarch fern is a vascular plant. | |
Scientific classification | |
Kingdom: | Plantae |
Clade: | Embryophytes |
Clade: | Polysporangiophytes Kenrick & Crane (1997) |
Subgroups | |
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