266 AMMIACEAE. 



or obsolete. Fruit strongly flattened dorsally, orbicular 

 to shortly oblong. Carpel with filiform ribs, and with 

 broadly winged laterals, these often distinct at base 

 and becoming cordate or emarginate, cohering until 

 maturity with those of the other carpel; pericarp thin. 

 Stylopodium wanting; disk Impressed. Oil-tubes 1-sev- 

 eral in the intervals. Seed strongly dorsally flattened, 

 with plane face. 



1. E. lucida Nutt. Short, caulescent, glabrous, rather stout, 

 1.5-5 dm, high; leaves ternate; leaflets broadly cordate, somewhat 

 lobed, coarsely mucronate-toothed, 1-2.5 cm. long; umbel equally 

 8-15-rayed; bractlets lanceolate; rays 1-5 cm. long; pedicels 12 mm. 

 long; fruit nearly orbicular, emarginate at each end, glabrous, 10- 

 14 mm. in diameter, with wings more than twice as broad as the 

 body, and prominent dorsal and intermediate ribs; oil-tubes solitary 

 in the intervals, 2-4 on the commissural side. 



Occasional on dry ground in the chaparral belt in all the moun- 

 tains. 



2. E. hassei C. & R. Caulescent, stout, 6 dm. high or more, 

 glabrous and somewhat glaucous, from a long slender woody root; 

 leaves biternate on very long petioles (sometimes 2.5 dm., including 

 petiole) ; leaflets broadly ovate with cuneate base, irregularly lobed, 

 coarsely mucronate-toothed, 2.5-10 cm. long, becoming 6 cm. broad; 

 umbel long-peduncled, equally 8-18-rayed; bractlets varying from 

 rather short linear-setaceous to oblanceolate, foliaceous, entire or 

 toothed and much exceeding the pedicels; rays 5-10 cm. long; 

 pedicels 12-16 mm. long; fruit as in the last. 



"Sierra Madre Canyon," Hasse. We have seen no specimens 

 that answer the description of this plant, but forms of the last 

 found in the Santa Monica Mountains seem to approach it. 



21. PASTINACA L. 



Tall erect mostly biennial branching herbs, with thick 

 roots, pinnate leaves, and compound umbels of yellow 

 flowers. Involucre and Involucels commonly none. 

 Calyx-teeth obsolete. Stylopodium depressed. Fruit 

 oval, glabrous, much flattened dorsally; dorsal and in- 

 termediate ribs filiform, the lateral winged, coherent 

 with those of the other carpel and forming a broad mar- 

 gin to the fruit. Oil-tubes solitary In the Intervals, and 

 2-4 on the commissural side. Seed very flat. 



1. P. sativa L. Usually biennial, glabrous or somewhat downy- 

 pubescent, 6-15 dm. high; the root long conic, fleshy; lower and 

 basal leaves petioled, pinnate, often 4.5 dm. long; leaflets rather 

 thin, ovate or oval, obtuse, sessile, lobed or incised and sharply 

 dentate, 2-6 mm. long; upper leaves generally much reduced; 



