Triodanis perfoliata  (Specularia p.) Venus looking-glass Campanulaceae TRPE; Bx, pb; Q, j; R;

Triodanis perfoliata.Elaine Haug @ USDA-NRCS PLANTS Database.Courtesy of Smithsonian Institution

Triodanis perfoliata.© Elaine Haug @ USDA-NRCS PLANTS Database.Courtesy of Smithsonian Institution (Accessed 4/2014).

Triodanis perfoliata is an annual herb, 10-100 cm tall, hairy or rough, few-branched, often flowering to near base. 

Leaves alternate, stalkless, clasping stem, blade heart-shaped 0.5-3 cm long and about as wide, rounded, veins palmate, margin usually toothed. 

Flowers purple to lavender, radially symmetrical (regular), 5-parted, fused at base, 0.8-1.3 cm long, in axils along upper stem, lower flowers closed, inconspicuous. 

Fruit capsule about 1 cm, opening by pores to release tiny seeds. 

Wetland status: FAC. 

Frequency in NYC: Very infrequent. 

Origin: Native. 

Habitat: Open habitats, disturbed, sterile soil.