Petrorhagia prolifera
Petrorhagia nanteuilii
childing pink, pink grass, proliferous childing-pink, proliferous pink, prolific petrorhagia
proliferous pink, tubercle seed pink grass
erect, simple or branched, (6–)20–30(–60) cm;
internodes glabrous or midstem ones slightly scabrous.
erect, simple or branched, (20–)30(–52) cm;
internodes glabrous or midstem and proximal ones minutely stipitate-glandular.
sheath 1–2 mm, ± as long as wide;
blade 3-veined, linear to linear-lanceolate, 10–30 mm, margins serrate-scabrous.
sheath (2–)3–4 mm, 1.5–2 times as long as wide;
blade 3-veined, linear, 10–25 mm, margins scabrous.
capitate;
inflorescence bracts and involucel bracteoles enclosing flowers, broadly ovate, brown-scarious, apex obtuse or of outer bracts mucronate.
capitate;
inflorescence bracts and involucel bracteoles enclosing flowers, broadly ovate, brown-scarious, apex of outer bracts mucronate, of inner bracts obtuse or mucronate.
0.1–1.5 mm.
0.1–2 mm.
sepals (7–)10–12 mm;
petals pink to slightly purplish (rarely white), primary veins 1, veins not darkly colored near base of blade, apex truncate or emarginate.
sepals (5–)10–12 mm;
petals pink to slightly purplish, primary veins 3, at least center vein darkly colored near base of blade, apex obcordate or 2-fid.
shield-shaped, 1.1–1.6(–1.8) mm, fine to coarsely reticulate.
shield-shaped, (1.3–)1.5–1.8 mm, tuberculate.
= 30 (Europe).
= 60 (Europe).
Petrorhagia prolifera
Petrorhagia nanteuilii
Historical records for Petrorhagia prolifera exist also for California (1902; Congdon s.n., MIN), Ohio (last collected in 1896; Stair s.n., OS), and South Carolina (1800s; Durand s.n., NY).
Petrorhagia prolifera has been known in the northeastern United States since at least 1837, and its range has since expanded, with isolated populations occurring southwestward from New Jersey toward Arkansas and Oklahoma as well as western Michigan. Some introductions may have been as a contaminant in grass seed used for highway planting in Tennessee (B. E. Wofford et al. 1977). Literature reports of P. prolifera in Louisiana and West Virginia have not been confirmed.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Petrorhagia nanteuilii is known from two counties in northern California (first collected in 1956) and a single site in British Columbia. It may be an alloploid derived through hybridization between P. prolifera and P. dubia; recent attempts at crossing the latter two have failed (S. M. Thomas and B. G. Murray 1983).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
BC
CA
MD Biodiversity
MI Flora
MO Plants
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
