| Since the midvein is at the center of the images it is clearly shown that the leaves curl toward their adaxial surface. |
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| Each toothlike leaf has a single, unbranched midvein. |
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| Its leaves are dull green with toothed margins and a raised midvein on the underside. |
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| The depression is formed by the midvein on one side of the nectary and a secondary vein on the opposite side. |
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| Soon after the cells of the marginal meristems begin to divide, procambial strands differentiate into the leaf from the stem bundles to form the midvein, or midrib. |
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| Only the midvein and some large lateral veins have any secondary growth. |
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| There is no midvein, and veins are longitudinally parallel. |
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| Generally each leaf, or microphyll, is narrow and has an unbranched midvein, in contrast to the leaves of the ferns and seed plants, which generally have branched venation. |
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| The calyx is thick, pentamerous, gamosepalous with small rounded to slightly acuminate calyx lobes that show traces of a midvein. |
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| Morphologically, these species share similar elliptic shape and size, cuneate base, retuse tip, similar ranges of petiole length, angles of 2° vein to midvein, and distance from the intramarginal vein to the margin. |
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| Leaves are cut along the midvein, rather than using separate leaves, to avoid potentially confounding effects associated with preexisting variation in individual leaves. |
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| The midvein is prominent and extends for most of the pinnule length. |
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| Eggs are laid in slits in the midvein on the upper side of the leaves. |
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