Philadelphus coronarius mock-orange Hydrangeaceae PHCO*; Bx, cf, pb, vc, wv; NY, ft, sp.; Q, a; R, gb, h, jw, k;


Philadelphus (Accessed 5/2014).

Philadelphus coronarius is a shrub to 4 m tall, colonial from root sprouts, older bark grooved, shreddy, pale, brown, branching opposite, stems arching, rather weak, brittle, young twigs brown, leaf scars horse-shoe shaped, with winter bud in center, vein scars three.

Leaves opposite, egg-shaped, 4-8 cm long, tip long-pointed, margin slightly toothed.

 Flowers white very fragrant, 2.5-3.5 cm wide, regular, petals 4, stamens yellow, numerous, calyx lobes 4, from an enlarged base (hypanthium) in branched clusters of 5-7 in racemes (unbranched clusters), June-July.

Fruit a dry capsule with numerous seeds.

Wetland status: NL.

Frequency in NYC: Occasional.

Origin: Europe.

Habitat: Escaped from cultivation. Can be aggressive.