526 UMBELLIFEREAE. (Vou. II. 
22. PIMPINELLA I.. Sp. Pl. 263. 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, 7. ¢., 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. 1. P. integerrima. 
Leaves pinnate, the segments incised; flowers white. 2. P. Saxtfraga. 
1, Pimpinella integérrima (L.) A.Gray. Yellow Pimpernel. (Fig. 2670.) 
Smyrnium integerrimum 1, Sp. Pl. 263. 
1753+ 
Zizia integerrima DC. Rap. Pl. Jard 
Genéve, 3: 7. 1830. 
Pimpinella integerrima A. Gray, Proc. 
Am. Acad. 7: 345. 1868 
Erect, branched, glabrous, somewhat 
glaucous, 1°-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’’-12’’ long; umbels slen- 
der-peduncled; rays 10-20, 2’-4’ 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 mE 
Saxifrage. (Fig. 2671.) UG, 
Pimpinella Saxifraga I,. Sp. Pl. 163. 1753. 
Erect, glabrous, 1°-2° high, somewhat 
branched. Leaves pinnate; segments of 
the lower 9-19, sharply serrate, or incised, 
ovate, or nearly orbicular, 8’/-12/’ long; 
upper leaves shorter-petioled and of fewer 
segments cut into narrower lobes; flow- 
ers white; umbels slender-peduncled, 7- 
20-rayed; rays slender, 1/-1%4’ 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. 1: 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. 
