Crataegus monogyna Jacq.

Oregon: Multnomah County: Portland Audubon Society, 5151 NW Cornell Road, Portland; Pittock Bird Sanctuary; Approximately 150 yards from Trailhead within 7 yards of the pond edge.
7630366E, 686428N
Datum: NAD 83.
Second growth forest, few large specimens still standing; near pond. Canopy remains relatively close throughout; tree approximately 30'; branchy and gangly, growing in part shade by pond in moist woods; this tree was the only specimen encountered; leaves deeply lobed, 2-3 cm long, glossy; flower creamy white with stamens > 10, styles 1-2; thorns 1 cm long on lower branches. Associated species: T. heterophylla, Pseudotsuga menziesii, Acer macrophyllum, Acer circinatum, Rubus spectabilis, Alnus rubra, Polystichum munitum and other ferns as well as a diverse herbaceous understory.

Leslie Bliss-Ketchum 20, Mar 6, 2007
HPSU, Accession: 13356