Petrorhagia prolifera
Petrorhagia
pink
erect.
opposite, bases sheathing, linear to linear-lanceolate to oblanceolate;
petioles 0;
stipules 0.
terminal; head-like cymes;
bracts 2–6, widely ovate, usually 5–12 mm wide, red- to brown-scarious, enclosing flowers.
bisexual;
sepals 5, fused, glabrous to sparsely hairy;
tubes prominent, cylindric; greenish or reddish, 15-veined; commissures between adjacent sepals veinless, scarious;
lobes < tube;
petals 5, pink to purplish, often with one or several darker veins;
limbs entire or 2-lobed;
styles and stigmas 2.
capsules, opening by 4 ascending to recurved valves.
8–15; shield- or helmet-shaped, 1–1.8 mm; black-brown to black, reticulate or conic-papillate.
Petrorhagia prolifera
Petrorhagia
Central Asia, Mediterranean region, North America. 33 species; 1 species treated in Flora.
Two additional species, closely resembling and related to Petrorhagia dubia, are to be expected in Oregon. Thus far known in Oregon from a single collection from Jackson County, Petrorhagia prolifera (childing pink) is distinguished from P. dubia by a shorter (1–2 mm) leaf sheath, petals that lack darkened veins, and reticulate, shield-shaped seeds generally 1.1–1.8 mm. Petrorhagia nanteuilii, a stable hybrid between P. dubia and P. prolifera, is known in North America from two sites in northern California and one in southern British Columbia and might be expected in Oregon. The taxon is best noted by having a 3–4 mm leaf sheath, petals with 1–3 darkened veins, and tuberculate, shield-shaped seeds generally 1.5–1.8 mm—features that are intermediate between the two parent taxa.
Rich Rabeler, Ronald Hartman
BC
CA
Flora NW
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
OR
