264 UMBELLIFERAE. 



fruit compressed laterally, oblong to orbicular, glabrous; carpels 

 with strong flattish corky ribs, the lateral largest at least in 

 section; oil-tubes solitary in the intervals, two on the commis- 

 sural side; seed nearly terete or somewhat dorsally flattened, the 

 commissural face plane or slightly concave. 



Leaflets thickish, lanceolate to ovate-lanceolate, closely and 



sharply serrate or even cleft, strongly reticulate beneath. C. douglasii. 



Leaflets thinner, linear-lanceolate, not so closely or sharply ser- 

 rate, not strongly reticulate beneath. C. vagans. 



Cicuta douglasii (DC.) Coult. & Rose. Glabrous and somewhat glaucous; 

 stems stout, 60-90 cm. high, loosely branched; leaves twice pinnate; leaflets 

 lanceolate to ovate-lanceolate, closely and sharply serrate or more or less 

 incised, 5-10 cm. long; fruit orbicular, 2 mm. long. 



In swamps, common. First collected by Douglas at the mouth of the 

 Columbia River. Root very poisonous. 



Cicuta vagans Greene. Very similar to C. douglasii; leaflets narrower, 

 linear-lanceolate, thin in texture, and less strongly reticulate beneath. 

 In swamps, probably only a form of C. douglasii. 



351. CORIANDRUM. Coriander. 



Annual herbs; leaves bipinnately divided; flowers white, in 

 spreading umbels; calyx 5-toothed; fruit globose, not constricted, 

 10-ribbed, the primary ribs inconspicuous. 



Coriandrum sativum L. Glabrous; stems slender, 60-90 cm. high; lower 

 leaves pinnate, the leaflets fan-shaped, many-cleft, the upper leaves more 

 dissected with linear ultimate segments; flowers white; fruit globose, smooth. 



In waste places, an escape from gardens. 



352. CARUM. Caraway. 



Smooth erect slender herbs; roots fascicled, tuberous or fusi- 

 form; leaves pinnate, with few linear leaflets; involucels of few 

 to many bracts; flowers white; calyx- teeth prominent for the 

 size of the fruit; stylopodium conical; fruit compressed laterally, 

 orbicular to oblong, glabrous; carpels with filiform or incon- 

 spicuous ribs; oil-tubes large and solitary in the intervals, 2-6 

 on the commissural side; seeds dorsally flattened, more or less 

 longitudinally grooved beneath the oil-tubes, the face plane or 

 slightly concave. 



Fruit orbicular, 2 mm. long. C. gairdneri. 



Fruit oblong, 3-4 mm. long. C. oreganum. 



Carum gairdneri (Hook. & Arn.) Gray. Roots fusiform, clustered; stems 

 erect, slender, 30-100 cm. tall, simple or branched above; leaves few, mostly 

 pinnate, with 3-7 linear leaflets, 5-15 cm. long, the lowermost rarely bipinnate, 

 the upper simple; umbels 6-15-rayed, the rays 2-4 cm. long; involucels linear, 

 acuminate; fruit subglobose, flattened, 1-2 mm. long, with small calyx-teeth. 



Common in low meadows. Roots edible, a favorite food of the Indians. 



