Crataegus monogyna one seed hawthorn Rosaceae CRMO*; Bx, pb; Q, a (cultivated); R;

Crataegus monogyna.commons.wikimedia.org

Crataegus monogyna.commons.wikimedia.org (Accessed 7/2014).

Crataegus monogyna is a small tree or shrub to 10 m (usually much less), densely branched; roots associated with ectomycorrhizal fungi (Dickinson 1985), spreading, bark dark, thorns to 2.5 cm. 

Leaves Alternate, to 5 cm long, broadly egg-shaped in outline, deeply 3-7 lobed, lobes narrow, pointed, margin toothed. 

Flowers white, with one style, fragrant, May. 

Fruit fleshy, red with one large seed, flesh yellow, Sept.-Oct. 

Wetland status: NL. 

Frequency in NYC: Very infrequent. 

Origin: Europe. 

Habitat: Horticultural, rarely escaping. Apparently not shade tolerant.