Leaf type: Heart-shaped
Leaf margin: Opposite
Phyllotaxis: Smooth
Colour: Green, young leaves may be reddish in color
Life cycle: Deciduous tree or shrub
Leaf (upper side)

Growth habit & biology
Syringa vulgaris grows as a deciduous shrub or tree and can reach a height of up to six meters. It spreads through seeds and runners.

Distribution
Syringa vulgaris originates from Eastern Europe and can also be found growing wild in regions where it is used as an ornamental plant. Neophytic occurrences are said to exist in some North American regions (source).

Botany
Lilac or common lilac is a member of the olive family (Oleaceae).


Oxalis acetosella (wood-sorrel)
Epimedium pinnatum (barrenwort)
Brunnera macrophylla (Siberian bugloss)
Lamium galeobdolon (yellow archangel)
Veronica persica (birdeye speedwell)
Viola odorata (sweet violet)