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
Codon (genus) Codon (genus) Codon is a small genus of plants from South Africa in the family Codonaceae in the order Boraginales. The genus "Codon" comprises two species. "Codon" was placed in the Hydrophyllaceae and Boraginaceae. Recent phyllogenetic analysis place it as sister group to the Wellstediaceae and Boraginaceae "s.str". The species of the genus "Codon" are annual to perennial herbs. The whole plants are densely covered with strong mineralised, unicellular trichomes on cystolithic foot-cells. The plants are growing from strong taproots. The flowers are tetracyclic and polymerous. The whorls are 10- to 20-merous with a high variability even within one plant