New Plant Observed in Dyke Marsh
Several people observed brown-eyed Susans (Rudbeckia triloba) this summer, 2017, along the Haul Road. It appears to be a new species of Rudbeckia for Dyke Marsh and this is the first photographic record of the species on George Washington Memorial Parkway (GWMP) properties. The plant was last observed in GWMP in Great Falls Park in 1919.
The brown-eyed Susan has alternate lanceolate or ovate leaves, reddish hairy stems and characteristic tri-lobed leaves near the bottom of the plant. Each upper stem has one or two flower heads which bloom from middle to late summer. The flower rays are bright yellow and oblong.
A number of pollinators use the plant, including solitary bees, carpenter bees, halictid bees, wasps, beeflies, butterflies and the goldenrod soldier beetle.
Thank you, Ed Eder, for your keen observations.