Petrorhagia 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 be found nearly worldwide, having
Sidalcea within this genus, although an ancestral annual state with annual paraphyly is also possible. Further, evolution rates within annual "Sidalcea" lineages appear to be faster than those of perennial lineages, at least when examining nuclear ribosomal DNA (internal and external transcribed spacer regions). Selected species: Garden cultivars are hybrids between "S. candida" and "S. malviflora". The cultivars "Elsie Heugh" and "William Smith" have gained the Royal Horticultural Society's Award of Garden Merit. Sidalcea Sidalcea is a genus (approx. 25 species) of the botanical family Malvaceae. It contains several species of flowering plants known generally as checkerblooms or checkermallows, or prairie