Swamp Sunflower in Howard Co., Maryland (10/11/2017). Photo by Bill Harms. (MBP list)
Swamp Sunflower in Dorchester Co., Maryland (10/19/2020). (c) Wayne Longbottom, some rights reserved (CC BY-NC). Photo by Wayne Longbottom. (MBP list)
A Swamp Sunflower in Dorchester Co., Maryland (9/15/2012). Note the extremely thin leaves which are a diagnostic field mark. Photo by Jim Brighton. (MBP list)
Non-flowering Swamp Sunflower in Dorchester Co., Maryland (7/29/2014). Photo by Jim Brighton. (MBP list)
The leaves of Swamp Sunflower in Somerset Co., Maryland (6/24/2014). Photo by Jim Brighton. (MBP list)
Swamp Sunflower in Kent Co., Maryland (10/17/2020). (c) tomfeild, some rights reserved (CC BY-NC). Photo by Tom Feild. (MBP list)
Swamp Sunflower in Kent Co., Maryland (10/17/2020). (c) tomfeild, some rights reserved (CC BY-NC). Photo by Tom Feild. (MBP list)
Swamp Sunflower in Dorchester Co., Maryland (6/24/2017). Photo by Bill Hubick. (MBP list)
Swamp Sunflower in Howard Co., Maryland (10/23/2019). Collected and processed by Helen Lowe Metzman. Photo by USGS PWRC. (MBP list)
Swamp Sunflower in Howard Co., Maryland (10/23/2019). Collected and processed by Helen Lowe Metzman. Photo by USGS PWRC. (MBP list)
Swamp Sunflower in Howard Co., Maryland (10/23/2019). Collected and processed by Helen Lowe Metzman. Photo by USGS PWRC. (MBP list)