Scrophularia marilandica is a perennial herb to 3 m tall; stem 4-sided, angles rounded, stems grooved between angles, specially hairy above.
Leaves opposite, egg-shaped, to 25 cm long, tip pointed, base rounded, margin coarsely toothed, stalk deeply grooved above but not winged, 1/3 to 1/2 as long as blade.
Flowers reddish-brown, irregular, tubular, to 0.8 cm long, calyx regular, with 5 rounded lobes; blooming July-Aug.
Fruit a smooth, 2-parted capsule, pointed tip, 0.4-0.7 cm long, brown, seeds wrinkled, numerous.
Wetland status: FACU-.
Frequency in NYC: Infrequent.
Habitat: Open woods, rich, moist soil.