Porella pinnata (Porella pinnata)
Description
A lax, dark green species of Porella, with shoots 2-4.5 mm wide, and large leaves (up to about 2 mm wide and 2.5 mm long) that contrast with very small, flat lobules and underleaves. Growth form and habitat are strong pointers to identification: P. pinnata floats like a fan on the downstream side of rocks and tree roots in rivers
Taxonomic tree
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Domain: Eukarya
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Kingdom: Plantae
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Phylum: Hepaticophyta
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Class: Jungermanniopsida
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Order: Porellales
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Family: Porellaceae
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Genus: Porella
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