Pimpinella saxifraga L.

Pimpinella saxifraga L. Sp. PI. 263. 1753
Tragoselinum Saxifragum Moench. Meth. 99. 1794.
Selinum Pimpinella E. H. L. Krause in Sturm, Fl. Deuts. ed. 2. 12: 53. 1904.
Apium Saxifragum Calest. Webbia 1: 178. 1905.
Perennial, glabrous to puberulent or subvillous, 1.5-6 dm. high; basal leaves oblong in general outline, excluding the petioles 3.5-12 cm. long, 2-7 cm. broad, pinnate, the leaflets 6-20, ovate to orbicular, 1-3 cm. long, sharply serrate, incised, or pinnately decompound; petioles 1.5-4 cm. long; cauline leaves reduced with smaller, linear-lanceolate divisions, the uppermost leaves reduced to narrow sheaths; peduncles 2-8 cm. long; involucre wanting, or of a few bracts; involucel wanting, or of a few bractlets; rays 7-20, 2-4 cm. long; pedicels 3-8 mm. long; calyxteeth obsolete; marginal petals often radiant; carpophore 2-cleft to the base; fruit oval to orbicular, 2-2.5 mm. long, 1.5-2 mm. broad, glabrous, compressed laterally, the ribs filiform and somewhat obscure; oil-tubes usually 3 in the intervals, 2-4 on the commissure; seed-face slightly concave.
Type locality: "In Europae pascuis siccis," collector unknown. Distribution: Eurasia; adventive from New Brunswick to Pennsylvania and Ohio.