Petrorhagia prolifera childing pink Caryophyllaceae PEPR*; Q, j (Stalter and Lamont 2002); K;


Credit: Photo by Daniela Longo

Petrorhagia by Daniela

Petrorhagia prolifera is an annual herb, 30-60 cm tall, sparsely branched if at all. 

Leaves opposite, 1-6 cm long, to 0.2 cm wide, linear, base sheathing stem to 0.2 cm, 3-veined. 

Flowers pink, radially symmetrical; petals 5, 1–1.4 cm long, tip entire or notched, 1 dark vein; calyx 5-lopbed; stamens 10; ovary superior, styles 2, 1 cm long; inflorescence small, dense, head-like, clusters of 3-7 flowers subtended by 2-6 brown egg-shaped bracts; blooms May-Sept. 

Fruit a dry capsule, opening by 4 valves to release seeds less than 0.1 cm long, surface sculptured 

Wetland status: UPL. 

Frequency in NYC: Very infrequent. 

Origin: SW Europe. 

Habitat: Escaped from cultivation in disturbed habitats. 

Notes: The name Petrorhagia comes from the Greek for rock fissure (Baldwin 2012).