Purdue University - Extension - Forestry and Natural Resources
In this spring bloom edition of ID That Tree, meet the bladdernut, which features clusters of tiny white/yellow flowers in the spring. Learn more about this small shrub from Purdue Extension forester Lenny Farlee inside.
If you have any questions regarding wildlife, trees, forest management, wood products, natural resource planning or other natural resource topics, feel free to contact us by using our Ask an Expert web page.
Resources:
ID That Tree, Playlist, Purdue Extension – Forestry and Natural Resources Youtube Channel
A Woodland Management Moment, Playlist, Purdue Extension – FNR Youtube Channel
Shrubs and Woody Vines of Indiana and the Midwest, Purdue University Press
Native Trees of the Midwest, Purdue University Press
Investing in Indiana Woodlands, The Education Store
Forest Improvement Handbook, The Education Store
Lenny Farlee, Sustaining Hardwood Extension Specialist
Purdue University Department of Forestry and Natural Resources
On this edition of ID That Tree, meet the American hornbeam, also known as the musclewood or the water or blue beech. This native Indiana understory tree stands out due to its gray bark and striations that resemble muscles and sinews as well as its doubly toothed leaves.
If you have any questions regarding wildlife, trees, forest management, wood products, natural resource planning or other natural resource topics, feel free to contact us by using our Ask an Expert web page.
Resources:
ID That Tree, Playlist, Purdue Extension – Forestry and Natural Resources Youtube Channel
A Woodland Management Moment, Playlist, Purdue Extension – FNR Youtube Channel
Shrubs and Woody Vines of Indiana and the Midwest, Purdue University Press
Native Trees of the Midwest, Purdue University Press
Investing in Indiana Woodlands, The Education Store
Forest Improvement Handbook, The Education Store
American Hornbeam, The Purdue Arboretum Explorer
Lenny Farlee, Sustaining Hardwood Extension Specialist
Purdue University Department of Forestry and Natural Resources
In this edition of ID That Tree, Purdue Extension forester Lenny Farlee introduces you to a member of the Indiana maple family that doesn’t follow the rest of its family’s traditions. Learn about the boxelder and its unique traits inside.
If you have any questions regarding wildlife, trees, forest management, wood products, natural resource planning or other natural resource topics, feel free to contact us by using our Ask an Expert web page.
Resources:
ID That Tree, Playlist, Purdue Extension – Forestry and Natural Resources Youtube Channel
A Woodland Management Moment, Playlist, Purdue Extension – FNR Youtube Channel
Shrubs and Woody Vines of Indiana and the Midwest, Purdue University Press
Native Trees of the Midwest, Purdue University Press
Investing in Indiana Woodlands, The Education Store
Forest Improvement Handbook, The Education Store
Boxelder, The Purdue Arboretum Explorer
Lenny Farlee, Sustaining Hardwood Extension Specialist
Purdue University Department of Forestry and Natural Resources
If you have any questions regarding wildlife, trees, forest management, wood products, natural resource planning or other natural resource topics, feel free to contact us by using our Ask an Expert web page.
Resources:
ID That Tree, Playlist, Purdue Extension – Forestry and Natural Resources Youtube Channel
A Woodland Management Moment, Playlist, Purdue Extension – FNR Youtube Channel
Shrubs and Woody Vines of Indiana and the Midwest, Purdue University Press
Native Trees of the Midwest, Purdue University Press
Investing in Indiana Woodlands, The Education Store
Forest Improvement Handbook, The Education Store
Yellowwood, The Purdue Arboretum Explorer
Lenny Farlee, Sustaining Hardwood Extension Specialist
Purdue University Department of Forestry and Natural Resources
In this edition of ID That Tree, Purdue Extension forester Lenny Farlee introduces you to a common understory shrub that features clusters of flowers and simple leaves reminiscent of red maple. Learn more about this native Indiana species inside.
If you have any questions regarding wildlife, trees, forest management, wood products, natural resource planning or other natural resource topics, feel free to contact us by using our Ask an Expert web page.
Resources:
ID That Tree, Playlist, Purdue Extension – Forestry and Natural Resources Youtube Channel
A Woodland Management Moment, Playlist, Purdue Extension – FNR Youtube Channel
Shrubs and Woody Vines of Indiana and the Midwest, Purdue University Press
Native Trees of the Midwest, Purdue University Press
Investing in Indiana Woodlands, The Education Store
Forest Improvement Handbook, The Education Store
Mapleleaf Viburnum, The Purdue Arboretum Explorer
Lenny Farlee, Sustaining Hardwood Extension Specialist
Purdue University Department of Forestry and Natural Resources

Image 1. Cicada damage is typically restricted to the small, outer twigs. Trees may be completely covered by cicadas or have a few isolated dead twigs. All trees in these images are expected to suffer no serious long term effects from this damage. Images by Clifford Sadof of Purdue University and Pennsylvania Department of Conservation and Natural Resources – Forestry.
Purdue Landscape Report: Dead leaves covering trees (image 1) or on the ground beneath them (image 2) in July would normally be a worrying sign for tree health, but this year much of the damage can be blamed on 17-year cicadas. This damage is unlikely to cause serious trouble for healthy, large trees and management is relatively simple. The choice to prune or not to prune comes down to cost, aesthetics, and concern for the next generation of cicadas.
How Cicadas Damage Plants
Cicada damage is similar to a light pruning and should not be an issue for healthy, mature trees. Cicadas damage trees when they lay their eggs in small twigs (3/16 to 1/2 inch in diameter) on deciduous trees and shrubs. They have a long, thin body part called an ovipositor that resembles a sewing needle that they stab into plants to lay their eggs. This action creates small holes and cracks in the bark (image 3). If enough cicadas lay their eggs in a twig, it can damage the bark enough to kill the twig (image 1).

Image 2. The dead twigs killed by cicada egg laying may break off the tree and litter the ground underneath. Image by Pennsylvania Department of Conservation and Natural Resources – Forestry.
Recognizing Cicada Damage
The degree of cicada damage depends on insect density and the number of trees in the area. To determine if a tree or bush has been damaged by cicadas, ask the following questions:

Image 3. Cicada egg laying damage varies between tree species, but is consistently in a straight, length-wise line along the branch. Note that all four examples also have signs of either puncture marks, cracks in the bark, or some combination of the two. Images by John Ghent, Clifford Sadof of Purdue University, Tim Tigner of Virginia Department of Forestry, and Pennsylvania Department of Conservation and Natural Resources – Forestry.
1. Were there 17-year cicadas within 50 meters (~164 ft) of the tree this year? Cicadas do not travel very far. If there weren’t noticeable numbers of 17-year cicadas nearby the damage was likely caused by something else.
2. Is the damage on a deciduous tree or bush? Cicadas rarely lay their eggs on evergreen trees and herbaceous plants. Damage on these types of plants is likely caused by something other than the cicadas.
3. What size of branches and twigs are damaged? Cicadas show a strong preference for small twigs (3/16 to 1/2 inch in diameter). As a result, damaged trees may appear as though their outer layer of leaves is dead while the inner leaves remain healthy (image 2). If larger branches are dead, the damage was probably not caused by cicadas.
4. Does the bark have typical egg laying damage? If you can reach the damaged twigs, look for a row of puncture wounds often connected by cracks length-wise along the branch. Their appearance may vary between tree species (image 3), but they will almost always be length-wise.
Resources:
17 Ways to Make the Most of the 17-year Cicada Emergence, Purdue College of Agriculture
Ask an Expert: Cicada Emergence Video, Got Nature? Blog, Purdue Extension-FNR
Periodical Cicada in Indiana, The Education Store, Purdue Extension resource center
Cicada Killers, The Education Store
Cicada, Youth and Entomology, Purdue Extension
Purdue Cicada Tracker, Purdue Extension-Master Gardener Program
Purdue Landscape Report
Elizabeth Barnes, Exotic Forest Pest Educator
Purdue University Department of Entomology
In this edition of ID That Tree, Purdue Extension forester Lenny Farlee introduces you to a native Indiana shrub that brings explosions of blossoms in the form of white flower clusters in the spring. Meet the blackhaw and learn more about how to identify this shrub inside.
If you have any questions regarding wildlife, trees, forest management, wood products, natural resource planning or other natural resource topics, feel free to contact us by using our Ask an Expert web page.
Resources:
ID That Tree, Playlist, Purdue Extension – Forestry and Natural Resources Youtube Channel
A Woodland Management Moment, Playlist, Purdue Extension – FNR Youtube Channel
Shrubs and Woody Vines of Indiana and the Midwest, Purdue University Press
Native Trees of the Midwest, Purdue University Press
Investing in Indiana Woodlands, The Education Store
Forest Improvement Handbook, The Education Store
Blackhaw, The Purdue Arboretum Explorer
Lenny Farlee, Sustaining Hardwood Extension Specialist
Purdue University Department of Forestry and Natural Resources
You may know sassafras for its fall fruit, but did you know this native Indiana tree also produces yellow spring blooms? Learn more about this tree in this edition of ID That Tree with Purdue Extension forester Lenny Farlee.
If you have any questions regarding wildlife, trees, forest management, wood products, natural resource planning or other natural resource topics, feel free to contact us by using our Ask an Expert web page.
Resources:
ID That Tree, Playlist, Purdue Extension – Forestry and Natural Resources YouTube Channel
A Woodland Management Moment, Playlist, Purdue Extension – FNR YouTube Channel
Shrubs and Woody Vines of Indiana and the Midwest, Purdue University Press
Native Trees of the Midwest, Purdue University Press
Investing in Indiana Woodlands, The Education Store
Forest Improvement Handbook, The Education Store
Sassafras albidum, Purdue Arboretum Explorer
Sassafras, The Education Store, Purdue Extension resource center
Lenny Farlee, Sustaining Hardwood Extension Specialist
Purdue University Department of Forestry and Natural Resources
MyDNR Newsletter, Indiana Department of Forestry and Natural Resources (IDNR): DNR biologists have confirmed a black bear sighting that occurred in northeast Vanderburgh County June 21st. The closest town to the location is Elberfeld, in Warrick County.
Biologists confirmed the bear from photos taken by the landowner.
“This is Indiana’s fourth confirmed black bear,” said Brad Westrich, DNR mammalogist. “With expanding bear populations in neighboring states, this is expected.”
“Human-bear conflicts can be avoided if you remove or secure potential food sources from your yard. Bears can smell food from more than a mile away.”
Black bears are rarely aggressive toward humans.
If you see a black bear:
Most problems that occur with bears arise when bears associate food sources with humans and lose their fear of people.
More guidelines for reducing or eliminating the potential for bear-human conflicts:
To view all DNR news releases, please see dnr.IN.gov.
Resources:
Wildlife, Playlist, Purdue Extension – Forestry and Natural Resources YouTube Channel
Black Bears, Indiana Department of Natural Resources (IDNR)
Report a Black Bear Sighting, Indiana Department of Natural Resources (IDNR)
Unexpected Plants and Animals in Indiana: Black Bear, College of Agriculture – Forestry and Natural Resources
Indiana Department of Natural Resources
Meet the Hawthorns, a family of small trees with wide-ranging features that make it difficult to tell various species apart. Learn about this group of native Indiana trees, which produce beautiful spring blooms, from Purdue Extension forester Lenny Farlee in this episode of ID That Tree.
If you have any questions regarding wildlife, trees, forest management, wood products, natural resource planning or other natural resource topics, feel free to contact us by using our Ask an Expert web page.
Resources:
ID That Tree, Playlist, Purdue Extension – Forestry and Natural Resources YouTube Channel
A Woodland Management Moment, Playlist, Purdue Extension – FNR YouTube Channel
Shrubs and Woody Vines of Indiana and the Midwest, Purdue University Press
Native Trees of the Midwest, Purdue University Press
Investing in Indiana Woodlands, The Education Store
Forest Improvement Handbook, The Education Store
Lenny Farlee, Sustaining Hardwood Extension Specialist
Purdue University Department of Forestry and Natural Resources