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Pteris longifolia f. bipinnata Proctor

leaf venation shape

Kubitzki et al
catadromous (leaves)
URI: http://eol.org/schema/terms/catadromous

Definition: a venation pattern in which the first vein in a given segment arises on the side of the leaf segment toward the base

Attribution: http://sweetgum.nybg.org/science/glossary/glossary-details/?irn=429

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