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
On the cultivation of the plants belonging to the natural order of Proteeae On the cultivation of the plants belonging to the natural order of Proteeae On the cultivation of the plants belonging to the natural order of Proteeae is an 1809 paper on the family Proteaceae of flowering plants. Although nominally written by Joseph Knight as a paper on cultivation techniques, all but 13 pages consists of an unattributed taxonomic revision now known to have been written by Richard Salisbury. Publication of the paper triggered one of the most bitter disputes in 19th century botany, because Salisbury had preempted the publication of numerous plant names that Robert Brown had intended to publish.