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Hymenophyllum trapezoidale Liebm.

leaf venation structure

Kubitzki et al
parallel/free (leaf veins)
URI: http://eol.org/schema/terms/freevein

Definition: veins run parallel and equidistant to each other for most of the length of the leaf; they may converge or fuse (anastomose) towards the apex

Attribution: https://en.wikipedia.org/wiki/Leaf#Veins

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