Robur, but in old age the boughs generally curve downwards, and the tree acquires a wide spreading head; the bark is dark brown, becoming grey and furrowed in large trees; the foliage varies much, but in the prevailing kinds the leaves are very deeply sinuated, with pointed, often irregular lobes, the footstalks short, and furnished at the base with long linear stipules that do not fall with the leaf, but remain attached to the bud till the following spring, giving a marked feature to the young shoots.
The stipules of the leaves act as protecting scale-leaves in the winter-bud and fall when the bud opens in spring.
The species are mostly low-growing herbs with alternate leaves provided with large leafy stipules (fig.
- Leaf of Viola tricolor (Pansy) showing the large leafy stipules (s).
At their base they are provided with stipules, which are also modified to form the scales investing the winter buds.
How would you define stipules? Add your definition here.