Definitions of petunia

n any of numerous tropical herbs having fluted funnel-shaped flowers

Petunia axillaris, large white petunia
annual herb having large nocturnally fragrant white flowers
Petunia integrifolia, violet-flowered petunia
herb or small shrublet having solitary violet to rose-red flowers
Petunia hybrida, hybrid petunia
hybrids of Petunia axillaris and Petunia integrifolia: a complex group of petunias having single or double flowers in colors from white to purple
Type of:
a plant cultivated for its blooms or blossoms

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