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Genus Petrorhagia (Ser.) Link

Link, Handb. Erkenn. Gewächse II (1831) 235; P. W. Ball et Heywood, Bull. Brit. Mus.(Bot.) 111 (1964) 129; Gypsophila sect. Petrorhagia Ser. in DC., Prodr. 1 (1824) 354; Tunica Mert. et Koch in Rörhl., Deutschl. Fl. III(1831) 182; Kohlrauschia Kunth, Fl. Berol. I (1838)108.

Fam: Caryophyllaceae Juss.
Genus: Petrorhagia (Ser.)
English Name: Tunica

Description:

Annual or perennial herbaceous plants. The stem is simple or branched, bare or glandular. Leaves opposite, styliform, linear or oblong. Flowers densely located in a head, twig or single, with or without bracts. The calyx is tubular or bell-shaped, with 5 teeth. Petals 5, longer than the calyx, with or without the claw, entire or incised at the top. The stamens 10. The carpellum of 2 carpels, with an upper ovary and two styles. Fruit multi-seed box, open with 4 teeth. Seeds flattened back and abdomen. The fetus is straight.

Table for determining of the species

1   Flowers with bracts ............................................................................................................................................................................................... 2
1* Flowers without bracts .......................................................................................................................................................................................... 5
2   The largest bracts usually narrower than 4 mm ....................................................................................................................................................... 3
2* The largest bracts usually at least 4 mm wide ......................................................................................................................................................... 4
3   Flowers single, rarely in bundles. The bracts are much shorter than the calyx. The stem is usually strongly branched .......... 3. - P. saxifraga (L.) Link
3* Colors usually in heads. The bracts almost as long as the flowers, more or less cover the calyx. Stem simple or tip slightly branched ............................ .......................................................................................................................................................... 4. - P. thessala (Boiss.) P. W. Bali, et Heywood
4   The leaf vagina at least twice as long as it is wide. Seeds shorter than 1.3 mm .........................…… 6. - P. velatina (Guss.) P. W. Ball, et Hey wood
4* The leaf vagina is no more than twice as long as it is wide. Seeds 1,3 - 1,9 mm .................................... 5. - P. prolifera (L.) P. W. Ball, et Heywood
5 (1)* Annual gentle plants without sterile basal rosettes. Stem bare .......................................................... 2. - P. alpina (Habl.) P. W. Ball et Heywood
5* Perennial plants, slightly stiff in the base, often with sterile rosettes. Stem dense glandular fiber, barely at the bottom, seldom the whole stalk naked ................................................................................................................................................................... 1. - P. illyrica (L.) P. W. Ball et Heywood

¹ Developed the Jordan. Radenkova.

From „Флора на НР България”, том III, БАН, София, (1967)

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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 been introduced to other continents.

From Wikipedia, the free encyclopedia

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References: „Флора на НР България”, том III, БАН, София, (1967), Wikipedia, the free encyclopedia

Distribution in Bulgaria: (Conspectus of the Bulgarian Vascular Flora) = conspectus&gs_l= Zlc.
Distribution:

SPECIES:

Petrorhagia prolifera (L.) P. W. Ball et Heywood - Childing-pink, Proliferous-pink

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