Petrorhagia been introduced to other continents. Petrorhagia Petrorhagia is a small genus of annual and perennial plants of the pink or carnation family, mostly native to the Mediterranean region. The genus is often referred to as Tunica, which is an obsolete synonym. It is low-growing with wiry stems and narrow, grass-like leaves. The flowers are small, in clusters similar to members of the genus "Dianthus", in pink, lilac, or white. "Petrorhagia saxifraga" is the tunic flower or coat flower, similar to Baby's Breath, but shorter, and used in rock gardens. These plants are mainly native to Eurasia, but some species can
Bacterial wilt of carnation stems often reveals brownish-yellow bacterial ooze. The wilting of the plant signifies the presence of rotten roots. This causes a significant decrease in the plants ability to anchor itself into the soil. Symptoms can take up to 2–3 years to surface. Visual symptoms are most readily seen in mature plants by inspection of aerial parts. Although there may be an extended period of latency, once plants begin showing symptoms, death typically occurs within 1–2 months. The contraction of Bacterial Wilt of Carnation is often followed by secondary fungal invasions and disease. To make a reliable diagnosis, multiple samples of stems