Plant of the Month: Green ash

chase.bergeson • July 14, 2023

Green ash (Fraxinus pennsylvanica)

Green ash (Fraxinus pennsylvanica) is the plant that we have recorded the most times at our wetland monitoring sites. We see many of its saplings at our site as well as mature trees. So how could it be in danger? 


Green ash is on the International Union for Conservation of Nature’s (IUCN) Red List as critically endangered due to its vulnerability to an invasive Asian beetle: the emerald ash borer. In NC, white ash, pumpkin ash, and Carolina ash are also vulnerable. This beetle lays its eggs on ash trees and larval emerald ash borers will feed on the tree, killing it, before flying to infest new trees. They have been responsible for the deaths of millions of trees and are likely to continue spreading. Human transportation of ash lumber, including firewood, has accelerated the spread of the emerald ash borer. There are some strategies for protecting trees, including cutting and burning infected trees to stop the spread and introducing predatory wasps. There is also promising evidence that some ash trees may show resistance to the beetle. However, it is likely that ash tree populations will continue to decline. You can find the extent of the emerald ash borer in North Carolina here. For more information: http://www.ncforestservice.gov/forest_health/fh_eabfaq.htm 


Green ash is a Facultative Wetland (FACW) plant in the Piedmont and the Coastal Plain, meaning you are more likely to find it in a wetland than in an upland. It makes sense why we see so many at our wetland sites. 


In summertime, a great way to identify many trees is by their leaves. What do you think of when you picture a leaf? How many leaves do you see pictured below?




Each picture is of one leaf! The leaf is the part of the plant that connects to the stem at a leaf bud. Ash trees have compound leaves, which means that their leaves have multiple leaflets- which do not connect at leaf buds but are part of the leaf as a whole. Young green ash saplings may not have compound leaves.  

Green ash leaflets are oval or lance shaped and toothed. They have a light green underside. 



Just like red maples (Acer Rubrum), ash trees are one of the few trees that have opposite branching, meaning that one branch should always have a twin growing at 180 degrees from it. Of course, in the life of the tree one of the branches might fall off or be damaged, so always check for any opposite branching on the tree. If you can look closely, you might see a scar on the tree where you would expect to see a branch, indicating that there used to be one present. 


Bark: Owen Clarkin



Mature green ash bark has many ridges and furrows and often has a yellowish tint. Stems will be smooth and have terminal buds (buds at the end) that look like a Phillip’s head screwdriver. 


Green ash trees may be confused for Carolina ash trees, but are often difficult to distinguish without the presence of its fruits (samaras). Green ash samaras are thin and pointy, while Carolina ash samaras are rounder. Although we currently conduct our vegetation surveys in summer, we can verify our identifications by returning in the Fall and winter and looking for fruits. The nice thing about iNaturalist is we can always go back and change our IDs, if necessary. 



For more plant resources checkout this guide on wetland plants: https://www.ncwetlands.org/plantguide/ 

And useful keys through the herbarium: https://herbarium.ncsu.edu/keysetc.htm 



Don't forget to check out our our iNaturalist page to see all the plants we've found so far!

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Celebrating Our Carolina Wetlands

By rick.savage July 7, 2026
July is Lakes Appreciation Month, an annual celebration led by the North American Lake Management Society (NALMS) to recognize the many ways lakes enrich our lives—from providing drinking water and recreation to supporting wildlife and local economies. It is also an ideal time to recognize one of a lake’s most important, yet often overlooked, partners: lacustrine wetlands. When many people picture a lake, they imagine open water stretching to the horizon. But healthy lakes are much more than open water. Around their shorelines lies a dynamic transition zone where land and water meet. These shallow, vegetated areas are known as lacustrine wetlands, and they are among the most productive ecosystems in the Carolinas. What’s the Difference Between a Lake and a Wetland? Although they are closely connected, lakes and wetlands are not the same. A lake is generally a body of open water deep enough that sunlight cannot always reach the bottom. In contrast, a wetland is defined by the presence of water at or near the surface long enough to support hydric soils and plants adapted to saturated conditions. Lacustrine wetlands occupy the shallow margins of lakes where water levels fluctuate seasonally. Because sunlight reaches the bottom, these areas support an abundance of native aquatic plants such as pickerelweed, arrowhead, bulrushes, and water lilies. Rather than competing with lakes, these wetlands help lakes function as healthy ecosystems. Think of them as the lake’s living shoreline. Nature’s Water Filter Before rainwater reaches a lake, it often flows through wetlands. Along the way, wetland plants slow runoff, trap sediment, absorb excess nutrients, and filter pollutants. This natural treatment system helps improve water clarity and reduce harmful algal blooms. The same wetlands also soften the impacts of floods by temporarily storing stormwater and slowly releasing it after heavy rains. As we have discussed in recent newsletters, healthy wetlands provide one of our most cost-effective defenses against flooding while protecting downstream communities. A Haven for Wildlife Lacustrine wetlands are biodiversity hotspots. Their shallow waters provide spawning and nursery habitat for fish, breeding grounds for amphibians, nesting areas for turtles, and feeding habitat for wading birds. Dragonflies patrol above the vegetation while pollinators visit native flowering plants along the shoreline. Many species spend their entire lives within these wetlands, while others depend on them during critical stages of migration or reproduction. Remove the wetland, and the lake loses much of the biological richness that makes it special. Carolina’s Lake-Associated Wetlands Across North and South Carolina, remarkable lake-associated wetlands demonstrate this close relationship between lakes and wetlands. The majestic cypress-gum swamps surrounding Lake Waccamaw create habitat for rare plants and animals found nowhere else. The extensive shoreline wetlands of Lake Mattamuskeet, the largest natural lake in North Carolina, support hundreds of thousands of migratory waterfowl each winter. Reservoirs such as Jordan Lake , Falls Lake , and Lake Norman also contain valuable coves, embayments, and shallow wetlands that provide wildlife habitat while improving water quality. Closer to home, many neighborhood lakes, farm ponds, and municipal reservoirs include wetland fringes that quietly perform these same ecological services every day. While these wetlands may seem ordinary, together they form an important network that benefits both people and wildlife. Some of our Wetland Treasures such as Merchants Millpond , Robertson Millpond , and Phelps Lake Shoreline are Lacustrine wetlands. Appreciating the Whole Ecosystem As you celebrate Lakes Appreciation Month, take a moment to look beyond the open water. Notice the cattails swaying along the shoreline, the chorus of frogs after sunset, the great blue heron stalking fish in the shallows, or the dragonflies darting among the lilies. Those vibrant edges are not simply the border of a lake—they are an essential part of the ecosystem. Protecting lakes means protecting the wetlands that surround them. Together, they improve water quality, reduce flooding, support biodiversity, and provide countless opportunities for recreation, education, and inspiration. At the Carolina Wetlands Association, we believe that every wetland matters—whether it borders a coastal marsh, a forested swamp, or a favorite Carolina lake. This July, as we celebrate Lakes Appreciation Month, let’s appreciate these remarkable partnerships between lakes and wetlands and continue working to conserve them for future generations. What is your favorite lake with beautiful wetlands? Share your photos and stories with the Carolina Wetlands Association and help us celebrate the wetland treasures that make our Carolina lakes so special. So go out and explore a wetland at your favorite lake or at one of our Wetland Treasures and remember that Carolina Wetlands Association is actively working to protect all wetlands. Your support is always appreciated. Rick Executive Director Carolina Wetlands Association
By Becky Ryon July 4, 2026
Buffers and Setback adopted by Cities and Towns
By rick.savage June 9, 2026
Hello Wetland Supporters, I hope everyone had a wonderful American Wetlands Month in May and found an opportunity to get outside and explore a wetland. We enjoyed fantastic paddling events at Robertson Millpond Preserve and Lake Mayo, where participants experienced the beauty and importance of these unique ecosystems firsthand. Wetlands have also been in the news recently as the impacts of recent Supreme Court decisions on wetland protections continue to be evaluated. Two recent articles highlight what is at stake: Lisa Sorg in Inside Climate News, Supreme Court’s Limitation on Wetlands Protection Will Make Flooding Worse Jesse Gourevitch and Adam Gold, New Research Shows What’s at Stake When Wetlands Disappea r The central message of both articles is clear: the loss of wetlands leads to increased flooding and rising economic costs for communities. Research cited by Gourevitch and Gold found that wetland loss across the United States has increased residential flood insurance claim payments by an estimated $10.1 billion since 1985 — approximately 9% of all insured riverine flood losses nationwide. The authors also emphasize that policymakers must better recognize the economic value wetlands provide in reducing flood damage to homes and communities. According to the research, the flood-mitigation value of currently unprotected wetlands is estimated at $177 billion nationwide , with North Carolina accounting for approximately $4.6 billion of those benefits . This research reinforces what the Carolina Wetlands Association has long understood: healthy wetlands are essential infrastructure for resilient communities. Through support from the NC Land and Water Fund, Carolina Wetlands Association have received three grants to partner with vulnerable communities to assess flooding concerns and develop restoration plans that incorporate community input, scientific data collection, and hydrologic modeling to identify the most effective wetland restoration strategies. We are also excited to share that we recently received a fourth NC Land and Water Fund grant to begin our first restoration project at Stony Run in Harnett County. Stony Run Walkable Watershed Lumbee Cultural Center Wetland Restoration By working alongside communities and restoring wetland resources, we are helping reduce potential flood damage while also providing additional benefits such as improved water quality, recreation opportunities, shoreline stabilization, environmental education, and greater community resilience. So, the next time you explore a wetland, remember that healthy wetlands mean healthy communities — and your support plays an important role in protecting these valuable ecosystems. Wetlands truly do matter. Best, Rick Savage Executive Director