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
Hydrophylloideae split up again in future. Plants in this subfamily may be annual or perennial herbs or shrubs, with either a prostrate or an erect stem. Most have a taproot. The flowers are bisexual, and normally radial, with 5 petals and 5 stamens. About 20 genera, containing around 300 species, are recognised; many of them are native to the western United States. The subfamily takes its name from the genus "Hydrophyllum" (waterleaf). Well known members include "Emmenanthe" (whispering bells), "Nemophila" (baby blue eyes) and "Phacelia" (scorpionweed). Hydrophylloideae Hydrophylloideae is a subfamily of the Boraginaceae family of flowering plants. Their taxonomic position