Smoke Tree

Arbor Walk #75, TreeKeeper ID #2753

This small 10-15 foot Eurasian tree is best known for the show it puts on annually; smoke trees produce pink to purple hair-like strands that emerge from their flowers each summer, appearing to be a “smoke” that covers the tree. The ‘Ancot’ cultivar has been bred to produce golden-green leaves rather than the traditional green leaves. In fall this tree’s leaves can turn a variety of colors, from amber to scarlet to green. This cultivar grows best in well drained soils because it has a shallow root system. The Smoke Tree is mainly used for decorative purposes, and has no serious disease or insect threats.

Common NameSmoke Tree
Latin NameCotinus coggygria
Indigenous Name(s) 
Cultivar/Variety‘Ancot’
Commercial NameGOLDEN SPIRIT
Global Distribution

Map coming soon

Where to find Arbor Walk #75 on WashU campus
Our Smoke Tree in space
GPS Coordinates

N/A

Percent Concrete

N/A

Distance to Buildings
YearClose Building #1Close Building #2Close Building #3
2020Danforth House, 29.57 mShepley House, 59.12 mWheeler House, 59.66 m
Distance to Other Species
YearClose Species #1Close Species # 2Close Species # 3
2020River Birch, 5.73 mSmoke Tree, 3.65 mRiver Birch, 4.06 m
Our Smoke Tree through time
Standard Measurements
YearHeight (m)DBH (cm)Caliper (m)Crown Diameter N-S (m)Crown Diameter E-W (m)Average Crown Diameter (m)
20203.97863.2N/A2.462.722.59
20234.6447/12N/A2.652.12.375
Nests and Pests
YearDescription
20201 bird nest
Several bunches of old, webbed-up leave that may be old webworm/tentworm nests
How to identify a Smoke Tree
Leaf Identification

The leaf of the Smoke Tree is simple (no leaflets), alternately arranged on the stem, and unlobed. Its shape is broadly elliptic to almost circular with a bluntly pointed tip, and can reach 3″ in length. The ‘Ancot’ cultivar has yellow-green leaves which turn maroon in the fall.

Twig and Bud Identification

The twig matures from green to tan, and is not zig zag.

Bark Identification

The bark is dark gray and covered in small thin plates, with little to no furrowing present between the plates. Multiple trunks will often develop from one tree.

Fruit Identification

The fruits of the Smoke Tree are drupes, developing singly on long pink stalks. The fruits range in shape from teardrop-shaped to kidney-shaped. They ripen in the fall.

Flower Identification

The flowers of the Smoke Tree emerge on multi-branched panicles. The flowers are inconspicuous and green-yellow. After the flowers bloom in the spring, the pedicels (individual flower stalks) develop long, silky, pink-purple hairs through the summer.

‘Ancot’ Identification

The ‘Ancot’ cultivar of the Smoke Tree is golden-leaved and develops a variety of autumn hues in its fall foliage.

Relationship of Cotinus coggygria to other species in the arboretum
Additional resources on the Smoke Tree

Take a look around Arbor Walk Tree #75