UMBELLIFER^E. 137 



2. A. atropurpurea Linn. : stem large, smooth, colored ; leaves ternate, 

 on large inflated sheathing petioles ; partitions subquinate ; leafets large, 

 oblong-ovate, coarsely serrate, sublobed ; the three terminal ones often 

 united at base ; general involucre none ; partial one of 8 10 subulate 

 leaves. A.iriquinataBig. A fchangelica atropurpurea Torr. <$ Gr. 



Wet meadows. Can. to Penn. June. '2J-. Stem 3 6 feet high, purplish. 

 (Dr. Darlington says it is sometimes nearly 3 inches in diameter at base.) Flow- 

 ers white. Much larger than the preceding. Root poisonous. 



Dark-purple Angelica. 



3. A. lucida Linn. : stem erect, glabrous ; leaves bi- and tri-pinnate ; 

 leafets equal, ovate, cuneate at base, incisely serrate ; general involucre 

 about 5-leaved ; partial one subulate. 



Shady woods. Can. to Car. Pursh. June, July. %. Stem 1 2 feet high. 

 Flowers white. Root aromatic. This is perhaps not a native of the U. S. See 

 Torr. fy Gr. Shining Angelica. 



17. ARCHEMORA. D. C. Archemora. 



kA fanciful name given by De Candolle in allusion to Archemorus, who is said 

 to have died from eating parsley.) 



Calyx with the margin 5-toothed. Petals obcordate, inflexed. 

 Fruit dorsally compressed, flat, oval or obovate. Carpels with 

 & subcarinate equidistant filiform ribs ; lateral ribs dilated into 

 a membranaceous margin nearly as broad as the seed. Gen- 

 eral involucre none or few-leaved ; partial one many-leaved. 



1. A.rigida D. C.: stem erect, rigid, striate; leaves pinnate, smooth; 

 leafets 4 5 pairs, large, oblong-lanceolate, entire or with several remote 

 teeth ; umbels terminal, on long peduncles ; general involucre none ; partial 

 one of 6 8 subulate leaves ; fruit much compressed. A. rigida var. a. 

 Torr. <$ Gr. Slum ngidius Linn. CEnanthe rigida Nutt. 



Swamps. N. Y. to Flor. Sept. %.- Stem 24 feet high. Leaves with a 

 white and sometimes scabrous margin. Flowers white. Rigid Archemora. 



2. A. ambigua D. C. : stem erect, slightly angular ; leaves pinnate, 

 smooth; leafets narrow-linear or linear-lanceolate, long, mostly entire, 

 somewhat glaucous beneath ; umbels terminal, subsolitary ; general invo- 

 lucre none ; partial one of 3 5 subulate leaves. A. rigida, var. /? Torr. 4"* 

 Gr. Slum longifolium Pursh. CEnanthe ambigua Nutt. 



Swamps. N. Y. and N. J. W. to Miss. Aug. %.Stem 35 feet high. 

 Flowers white. Both species are supposed to be poisonous. 



Ambiguous Archemora. 



18. PASTINACA. Linn. Parsnip. 

 (From the Latin paslus,food ; in allusion to the use made of the root.) 



Calyx with the margin obsolete or minutely denticulate. 

 Petals roundish, entire, involute. Fruit dorsally and flatly 

 compressed, surrounded by a dilated margin. Carpels with 

 very slender ribs ; 3 intermediate ribs equidistant ; 2 latera 1 

 ones contiguous. Involucres none or few-leaved. 



