Yellowwood

Arbor Walk #21, Treekeeper ID #1882

This medium sized shade tree has panicles of sweet smelling flowers in early summer and brilliant yellow leaves in the fall.

The Yellowwood typically grows up to around 30 to 50 feet, with a lifespan under 100 years. Mainly used for decorative purposes, its white flowers hang in clusters in the spring. There are multiple trunks coming off of its main one, making it susceptible to storm damage, so it needs to be pruned and maintained to ensure the tree limbs do not break.

Common NameYellowwood
Latin NameCladrastis kentukea
Indigenous Name(s) 
Cultivar/Variety 
Commercial Name 
Global Distribution
Where to find Arbor Walk #21 on WashU campus
Our Yellowwood in space
GPS Coordinates

N/A

Percent Concrete

N/A

Distance to Buildings
YearClose Building #1Close Building #2Close Building #3
2020Somers Family Hall, 8.89 mMcDonnell Hall, 15.34 mWilson Hall, 53.39 m
Distance to Other Species
YearClose Species #1Close Species # 2Close Species # 3
2020Magnolia spp., 15.76 mNorthern Red Oak, 16.61 mMagnolia spp., 22.78 m
Our Yellowwood through time
Standard Measurements
YearHeight (m)DBH (cm)Caliper (m)Crown Diameter N-S (m)Crown Diameter E-W (m)Average Crown Diameter (m)
20209.258632N/A9.4210.059.735
202312.337N/A10.210.110.15
202411.0237.5N/A11.3311.0511.19
Nests and Pests
YearDescription
2020Grey, green, and yellow lichen on trunk bark.
How to identify a Yellowwood

ts have variable shape but are 3-4″, dark green above and pale green below, with a slightly acuminate tip. The leaf can reach 1′ in length, and the leaflets will turn yellow in the fall.

Twig and Bud Identification

Young twigs are soft and hairy, although they lose the hair over time. Mature twigs are dark reddish-brown with pale lenticels (pores). The leaf scars are cream-colored and bowl-shaped. The terminal buds are conical, yellowish-brown, and concealed within the terminal petiole until it breaks off in the fall.

Bark Identification

The bark of the Yellowwood is generally smooth, often lichen-covered, and can have “etchings” or other irregular raised bumps along its surface.

Fruit Identification

The fruit of the Yellowwood is a flat, slender pod holding multiple seeds. The pods are light brown when mature and up to 4″ in length. The fruits ripen in late summer.

Flower Identification

The flowers of the Yellowwood are mounted on long hanging panicles, with compound peduncles branching off of the main peduncle, holding flowers on shorter pedicels. The flowers are white, fragrant, and irregularly five-petaled (though they may appear to have only four). The flowers bloom in late spring.

Relationship of Cladrastis kentukea to other species in the arboretum
Additional resources on the Yellowwood

Take a look around Arbor Walk Tree #21