leaf scar


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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.
References in periodicals archive ?
Bothrodendron punctatum has oval leaf scars up to 2 mm long with ligule pits contiguous with the top of the leaf scar.
Ulodendron always has persistent leaves attached to diamond-shaped leaf cushions and never exhibits leaf scars.
Thus for feedback for the 'root' choice we point out that although potatoes grow beneath the ground they have buds and leaf scars (features of stems) (Fig.
It is distinguished by biconvex leaf scars on the rhizomes, and deeply cordare, ovate to oblong leaves with a prominent midrib and pinnate venation.
Visitors will also learn why different trees have different-shaped trunks, what bark is for, and how trees gain leaf scars on their branches.
With cerium, most of the above-mentioned symptoms produced with lanthanum were noted, except the stimulation of growth of the trunk and the farther spacing of the leaf scars.
Its twigs "zigzag with very thick pith, at first light brown, becoming ashy gray by winter and marked with occasional lenticels and elevated leaf scars with deep horizontal, crescent shape.
The best walking sticks have these natural leaf scars, as opposed to a cut or tom leaf socket.
This trunk adpression comprised a root mantle from which protruded well preserved, large (7 cm diameter), configuous leaf scars arranged in two rows on either side of the trunk (Fig.
Based on Dawson's drawings (which illustrate the specimen upside down), a deep indentation is evident on the abaxial side of the vascular bundle of all of the leaf scars.
Leaf scars, which resemble suction cups, are found on the winter twigs when the leaves fall.