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Relationship of the distance between transverse veins and that between small longitudinal veins in leaf blades of C3 and C4 grasses. Slopes of dotted lines show the ratio of the distance between small longitudinal veins (y) to that between transverse veins (x). LV, longitudinal vein; TV, transverse vein; Br, Bromus rigidus; Hi, Hymenachne indica; Os, Oryza sativa.
