Triosteum perfoliatum.flowers.© 2003 Eleanor Saulys.www.ct-botanical-society.org (Accessed 4/2014).

Triosteum perfoliatum is a perennial herb, to 1.3 m, stems hairy, rather coarse. 

Leaves opposite, stalkless (sessile), widest above middle, to 30 x 15 cm, narrowed below middle, hairy above, densely hairy below, base joined across stem, fused (perfoliate) base to 9 cm wide. 

Flowers dark red to greenish-yellow, tubular, to 1.7 cm long, densely glandular-hairy, base swollen on one side, petal-lobes 5, unequal, spreading, calyx lobes to 1.8 long, 0.1 cm wide, hairy, linear, in small axillary clusters of 3-4; blooms May-July. 

Triosteum perfoliatum.fruit.© 2003 Janet Novak.www.ct-botanical-society.org

Fruit fleshy, orange, rounded, Aug.-Oct. 

Wetland status: UPL. 

Frequency in NYC: Very infrequent. 

Origin: Native. 

Habitat: Open woods, edges.  . Accessed 5/2014).