TREES & plants

EXCLAMATION!™ London planetree

EXCLAMATION!™ London planetree has attractive mottled bark.

The EXCLAMATION!™ London planetree is a Chicagoland Grows® introduction that is resistant to anthracnose and frost cracking. It is a large tree with beautiful peeling bark.

Botanical name: 
Platanus acerifolia 'Morton Circle'
All Common Names: 
EXCLAMATION!™ London planetree
Family (English): 
Sycamore, planetree
Family (Botanic): 
Tree or Plant Type: 
  • Tree
  • Deciduous (seasonally loses leaves)
Native Locale: 
  • Non-native
Planting Site: 
  • Residential and parks, 
  • City parkway, 
  • Wide median, 
  • Restricted sites
Landscape Uses: 
  • Parkway/street, 
  • Shade tree, 
  • Specimen
Size Range: 
  • Large tree (more than 40 feet)
Mature Height: 
55-65 feet
Mature Width: 
40-50 feet
Light Exposure: 
  • Full sun (6 hrs direct light daily)
Hardiness Zones: 
  • Zone 4, 
  • Zone 5 (Chicago), 
  • Zone 6, 
  • Zone 7, 
  • Zone 8
Soil Preference: 
  • Moist, well-drained soil
Acid Soils: 
  • Tolerant
Alkaline Soils: 
  • Tolerant
Salt Spray: 
  • Tolerant
Soil Salt: 
  • Tolerant
Drought Conditions: 
  • Tolerant
Poor Drainage: 
  • Moderately Tolerant
Ornamental Interest: 
  • Showy fruit, 
  • Attractive bark
Season of Interest: 
  • Early winter, 
  • Mid winter, 
  • Late winter, 
  • Early fall
Flower Color & Fragrance: 
  • Inconspicuous
Shape or Form: 
  • Pyramidal
Growth Rate: 
  • Fast
Transplants Well: 
  • Yes
  • Birds, 
  • Insect pollinators, 
  • Small mammals
More Information: 

Tree & Plant Care

Plants grow best in moist, deep, rich well-drained soil in full sun. Does not tolerate shady sites.
Soil pH adaptable, moderately salt and drought tolerant.
Can be a messy tree since drops a lot of leaves, twigs and fruit.

Disease, pests, and problems

Possible problems include canker stain and sycamore lacebug.

Disease, pest, and problem resistance

Resistant to anthracnose, powdery mildew and frost cracking.

Native geographic location and habitat

Of hybrid origin.

Bark color and texture 

The bark is peeling, revealing a mottled pattern of green, tan and brown.

Leaf or needle arrangement, size, shape, and texture

The alternate leaves are large (6 to 7 inches long and up to 10 inches wide), and palmately lobed.
The medium green leaves change to yellow and brown in fall.

Flower arrangement, shape, and size

Monoecious, with separate male and female flowers. Flowers appear in early spring with the leaves as dense globose balls on long stalks (peduncles).
Male flowers are green , females are showier, bright burgundy-red.

Not ornamentally important .

Fruit, cone, nut, and seed descriptions

Ball-like seed heads (1 inch diameter)  hang in pairs from long stalks. Seeds shatter during winter months. This cultivar tends to produce less fruit than the species.

Platanus acerifolia 'Morton Circle' or EXCLAMATION!™ London planetree