单词	leaf scar
释义	leaf scar leaf scar n. The mark left on a twig after a leaf falls. leaf scar leaf scar [′lēf ‚skär] (botany) A mark on a stem, formed by secretion of suberin and a gumlike substance, showing where a leaf has abscised. leaf scar Fig. 206 Leaf scar . Position on stem. leaf scar a scar left on a stem after leaf ABSCISSION. Visible on the scar is a number of smaller scars, each one marking the position at which a VASCULAR BUNDLE entered the petiole of the LEAF.
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