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Term Definition
Midrib plane adaxially A midrib rib that is neither salient or impressed toward the base of the adaxial side of the leaf blade, i.e., it is flat with the leaf blade surface. Midrib section of Couratari asterophora. Photo by S. A. Mori.
Plane Referring to a structure that is flat, even, or level with the surface of the structure in which it occurs; i.e., without projectiing above the surface of an organ. Venation of Eschweilera cyathiformis. Photo by S. A. Mori.