526 



UMBELLIFEREAE. 

 22. PIMPINELLA L. Sp. PI. 263. 



[VOL. II. 



1753. 



Glabrous, perennial herbs, with compound leaves and compound umbels of yellow or 

 white flowers. Involucre and involucels none in our species. Calyx-teeth obsolete. Petals 

 inflexed at the apex. Stylopodium thick, broadly conic. Fruit ovate, or oblong, sometimes 

 broader than long, more or less compressed. Carpels obscurely 5-angled with slender equal 

 distant ribs; oil-tubes numerous, 2-6 in the intervals. Seed-face flat or slightly convex, 

 [Latin; perhaps from bipinnula, /. c., bipinnate. ] 



About 75 species, natives of the northern hemisphere and South Africa. Besides the following, 

 another is said to occur in the western United States. 



Leaves ternately compound, the segments entire; flowers yellow. 

 Leaves pinnate, the segments incised; flowers white. 



i. P. integer> itna. 

 a. P. Saxifraga. 



x. Pimpinella integerrima (L.) A. Gray. Yellow Pimpernel. (Fig. 2670.) 



Smyrnium integerrimum L. Sp. PI. 263. 



Zizia integerrima DC. Rap. PI. Jard 



vi-, 3: 7. 1830. 



Pimpinella integerrima A. Gray, Proc. 

 Am. Acad. 7: 345. 1868. 



Erect, branched, glabrous, somewhat 

 glaucous, i-3 high, slender. Leaves 

 2-3-ternate, the upper with short dilated 

 petioles, the lower long-petioled; seg- 

 ments ovate, oval, or lanceolate, obtuse, 

 or acutish and often mucronulate at the 

 apex, entire, 6' / -i2 // long; umbels slen- 

 der-peduncled; rays 10-20, 2'-4 x long in 

 fruit; flowers yellow; pedicels slender; 

 fruit oval, glabrous, about 2" long. 



In rocky or sandy soil, Quebec to North 

 Carolina, west to Ontario. Minnesota and 

 Mississippi. Ascends 4000 ft North Caro- 

 lina. May-June. 



2. Pimpinella Saxifraga L/. 



Bennet. Pimpernel. Burnet 



Saxifrage. (Fig. 2671.) 



Pimfnnella Saxifraga L. Sp. PI. 163. 1753. 

 Erect, glabrous, i-2 high, somewhat 

 branched. Leaves pinnate; segments of 

 the lower 9-19, sharply serrate, or incised, 

 ovate, or nearly orbicular, 8"-i2" long; 

 upper leaves shorter- petioled and of fewer 

 segments cut into narrower lobes; flow- 

 ers white; umbels slender-peduncled, 7- 

 2orayed; rays slender, i'-i#' long in 

 fruit; fruit oval. 



In waste places, eastern Pennsylvania and 

 northwestern New Jersey at several locali- 

 ties in the valley of the Delaware, and in 

 Ohio. Adventive from Europe. June-Oct. 



23. APIASTRUM Nutt.; T. & G. Fl. N. A. i: 643. 1840. 



Annual glabrous slender much branched herbs, with petioled finely dissected leaves, the 

 leaf-segments linear or filiform. Flowers very small, white, in terminal or axillary compound 

 unequal-rayed umbels. Involucre none; involucels of a few small bracts, or none. Calyx- 

 teeth obsolete. Fruit ovate, or suborbicular, laterally flattened, tubercled, not ribbed; peri- 

 carp thin; oil-tubes few, not clustered, 2 on the commissural side. Seed-face concave. 

 Stylopodium very small. [Greek, false celery.] 



Two known species, the following, and one in California. 



