Yellow Pimpernel

Taenidia integerrima (L.) Drude ex E. & P. Nat Pfl. 3 8 : 195. 1898.
Smyrnium inlegerrimum L. Sp. PI. 263. 1753.
Angelica inlegrifolia Walt. Fl. Car. 115. 1788.
Sison integerrimus Spreng. Syst. 1: 887. 1825.
Zizia integerrima DC. Mem. Soc. Phys. Nat. Hist. Geneve 4: 493. 1829.
Pimpinella integerrima A. Gray, Proc. Am. Acad. 7: 345. 1868.
Pimpinella inlegrifolia Wood, Bot. & Fl. 139. 1870.
Plants 3-8.5 dm. high, the stems purplish toward the base; basal leaves ovate to obovate in general outline, excluding the petioles 2.5-9 cm. long, 5-9 cm. broad, the leaflets ovate to lanceolate, 1-2.5 cm. long, 5-15 mm. broad, rounded to acute, shortly mucronulate at the apex, slightly decurrent to rounded at the base, sessile; petioles 4-17 cm. long; cauline leaves like the basal, the leaflets 15-45 cm. long, 8-35 mm. broad with wholly sheathing petioles 1-9.5 cm. long; peduncles 1-20 cm. long; rays 15-20, 15-95 mm. long, spreading to ascending, the central rays sterile and half the length of the fertile; umbellets about 35-flowered, the central flowers sterile and short-pedicellate; fertile pedicels 7-12 mm. long; fruit 3-4 mm. long, 2-3 mm. broad.
Type locality: Virginia. Clayton 549.
Distribution: Quebec and Ontario to Georgia, west to Minnesota, Kansas, and Arkansas (Biltmore Herb. 4350a, Friesner 7367, Mathias 1399).