Physostegia virginiana  (Dracocephalium v.) obedient plant; false dragonhead Lamiaceae PHVI; R;

Physostegia virginiana.commons.wikipedia.org

Physostegia virginiana.commons.wikimedia.org. (Accessed 4/2014).

Physostegia virginiana is a perennial herb to 1.5 m, may be colonial from stolons, stems 4-sided, branched only near top. 

Leaves opposite, stalkless, except sometimes the lowest pairs, these are soon deciduous; blade 5-15 cm long, 0.7-4.5 cm wide, much smaller on upper stem (Radford et al. 1968), elliptic or widest above middle, tip sharply pointed, base pointed, margin sharply toothed. 

Flowers pale purple-pink, 1.5-3 cm long, bilaterally symmetrical, tubular, two-lipped, upper lip hood-shaped, lower lip 3-lobed, calyx often sprinkled with tiny glandular dots, inflorescence spike-like (racemes) at ends of branches, axis hairy, with a small bract below each flower. 

Fruit dry nutlets 0.3 cm long, July-Sept. 

Wetland status: FAC+ 

Frequency in NYC. Very infrequent (USDA, NRCS 2006). 

Origin: Native.

Habitat: Moist soil, riverbanks. damp successional habitats.