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Lilac

Lilac is a genus of fragrant flowering shrubs and small trees in the olive family, Oleaceae.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated July 27, 2026|2 min read| Fact-checked

Lilac is a genus of fragrant flowering shrubs and small trees in the olive family, Oleaceae. The best-known species is the common lilac, Syringa vulgaris, which is widely cultivated for its scented spring flowers. Lilacs are native to eastern Europe and temperate Asia and include many cultivated varieties.

Description

Lilacs are deciduous shrubs or small trees with heart-shaped leaves and dense clusters of small, tubular flowers. They are valued in gardens and landscaping for their fragrance and spring bloom.

Taxonomy and species

Lilac belongs to the genus Syringa in the family Oleaceae. Sources describe roughly 25 to 30 species, with Syringa vulgaris as the best-known and most widely cultivated.

Cultivation and varieties

Lilacs have been widely hybridized, producing many cultivars with different flower colours, forms, and bloom times. They are commonly grown as ornamental plants in temperate climates.

Native range and distribution

The genus is native to eastern Europe and temperate Asia, and common lilac originates from southeastern Europe. Lilacs are now widely cultivated in Europe and North America and can naturalise in some regions.

Key facts

  • Lilac is a genus of around 25 species in the olive family.
  • The plants are known for their fragrant spring flower clusters.
  • Common lilac, Syringa vulgaris, is the most widely recognized species.
  • Lilacs are native to eastern Europe and temperate Asia.
  • Extensive cultivation has produced many named varieties and cultivars.
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Canadian context

Lilacs are widely grown as ornamental shrubs in Canada, especially in gardens and older landscapes; common lilac is also naturalised in parts of Canada.

Frequently asked questions

What is a lilac?
A lilac is a genus of flowering shrubs and small trees in the olive family, Oleaceae, known for fragrant spring flowers.
What is the scientific name of lilac?
The genus is Syringa; the common lilac is Syringa vulgaris.
Where are lilacs native to?
Lilacs are native to eastern Europe and temperate Asia.
When do lilacs bloom?
Lilacs typically bloom in spring, often from April to June depending on the species and cultivar.
What family do lilacs belong to?
Lilacs belong to the olive family, Oleaceae.

References

  1. Encyclopaedia Britannicahttps://www.britannica.com/plant/lilac
    Supports: Genus, family, native range, and general description of lilac.
  2. Chicago Botanic Gardenhttps://www.chicagobotanic.org/plant-information/plant-profiles/lilacs
    Supports: Number of species/varieties, cultivation, and bloom timing.
  3. North Carolina State Extensionhttps://plants.ces.ncsu.edu/plants/syringa-vulgaris/
    Supports: Common lilac identification, family, cultivar colours, and spring-flowering habit.
  4. University of Massachusetts Amhersthttps://www.umass.edu/agriculture-food-environment/landscape/publications-resources/plant-identification/lilac
    Supports: Scientific name, family, native range, and flower colours.
  5. University of Maine Extensionhttps://extension.umaine.edu/signs-of-the-seasons/indicator-species/lilac-fact-sheet/
    Supports: Common lilac morphology, native status in North America, and natural distribution in Canada and the northeastern United States.