Syringa pinnatifolia Hemsl.

A deciduous shrub to 4 m tall. Leaves pinnate, to 8 cm or so long, hairless. Leaflets 7, 9 or 11, ovate to lanceolate, each to 3 cm long and about 1 cm wide, stalkless. Flowers white with a hint of lilac, in clusters to 7.5 cm long. Floral tubes about 12 mm long, the lobes spreading.

W China

This is the only species that has truly pinnate leaves, unlike several other species and hybrids which have dissected leaves.

Source: Spencer, R. (2002). Oleaceae. In: Spencer, R.. Horticultural Flora of South-eastern Australia. Volume 4. Flowering plants. Dicotyledons. Part 3. The identification of garden and cultivated plants. University of New South Wales Press.

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kingdom Plantae
phylum   Tracheophyta
class    Magnoliopsida
superorder     Asteranae
order      Lamiales
family       Oleaceae
genus        Syringa L.