Quercus phellos Fagaceae
Willow Oak KWER-kus FEL-os
- Broadleaf deciduous tree, 50-60 ft (15-18 m), excurrent (ie., prolonged main axis from which lateral
branches arise), oblong oval crown, fairly open (light shade), descending branches, (growth habit similar to
a pin oak); stems slender, reddish-brown to dark brown. Leaves alternate, simple, 5-13 cm long,
narrow (0.8-2.5 cm wide), elliptical or lance-shaped (willow-like), wavy entire margin. Autumn
color yellow or russet red to red. Small acorns, about 12 mm or less.
- Sun, transplants easier than other oaks, has a fibrous root system. Prefers moist well-drained
soil but can adapt to difficult habitats.
- Hardy to USDA Zone 5 Native range from New York to Florida, west to
Missouri and Texas.
- phellos: according to Jacobson (1996) the term is an ancient Greek name for the cork oak (Q.
suber), and for some reason Linnaeus applied it to this species.
- Oregon State Univ. campus: large tree on west side of Stand Ag. Hall.
- Corvallis: a row of them north of the Osborn Aquatic Center, Circle Ave. and Highland St.