Dicotyledones. 85 



V. CHaiROPHYLLUM. Chervil. 



(Gr., chairo, to gladden: phyllon, leaf. From agreeable odor of the leaves.) 



Annuals, growing mostly in moist soil. Leaves ternately decom- 

 pound with pinnatifid leaflets. Flowers white, few in the umbellets ; 

 umbels few-rayed. Involucre usually none ; involucels of numerous 

 small bracts. Calyx teeth obsolete ; petals reflexed at the apex. Car- 

 pels more or less 5-angled. Fruit oblong to linear-oblong. Ribs 

 slender and obtuse ; oil tubes solitary in the intervals. 



I. Chaerophyllum prociimbens, Crantz. (L., procumbens, falling forward.) 

 Spreading Chervil. Stems slender, branched, mostly spreading, more or less 

 pubescent, 6 to i8 inches high. Umbels 2-6-rayed. Flowers few in the umbellets. 

 Fruit linear-oblong and glabrous. In moist ground. 



VI. OSMORRHIZA. Sweet Cicely. 



(Gr., osme, a scent; rhiza^ root.) 



Perennial herbs from fleshy, clustered, aromatic roots. Leaves ter- 

 nately decompound. Flowers white in few-rayed umbels. Involucre 

 and involucels wanting or of few bracts. Calyx teeth obsolete ; petals 

 incurved at the apex. Fruit oblong-linear, short-beaked, attenuate at 

 the base, usually quite bristly along the equal ribs. Oil tubes obsolete 

 or none. 



i. Osmorrhiza brevistylis, DC. (L., irevis, short; stylus, stem or point.) 

 Short-styled or Woolly Sweet Cicely. Erect, rather stout, becoming 

 branched above, i4 to 3 feet high, villous pubescent. Lower leaves large, long- 

 petioled, sometimes 1 foot across. Umbellets on long peduncles, 2-6-flowered. 

 Style and stylopodium about ^ inch long. In woods. 



:a. Osmorrhiza longistylls, DC. (L., longus, long; stylus, stem or point.) 

 Longer-styled or Smoother Sweet Cicely. Similar to the preceding species, 

 but only slightly pubescent or glabrous, and style and stylopodium about j^ inch 

 long. In woods. 



VII. ERIGKNIA. Harbinger of Spring. 



(Gr., erigeneia, born in the spring.) 



Low, glabrous, nearly acaulescent plants rising from a deep tuber. 

 Leaves ternately decompound, generally only i or 2. Flowers white 

 in small umbels. Calyx teeth obsolete ; petals flat and entire. Fruit 

 nearly orbicular, incurved at top and bottom; carpels nearly kidney- 

 shaped, each 5-ribbed, and 1-3 small oil tubes in each interval. 



