(PARSLEY FAMILY.) 153 



9. ARC HEM OR A, DC. COWBANE. 



Calyx 5-toothcd. Fruit with a broad single-winged margin, oval, flattish; 

 the carpels with 5 obtuse and approximated equidistant ribs on the convex 

 back : oil-tubes one in each interval, and 4-6 on the inner face. Smooth 

 perennials, with rather rigid leaves of'3-9 lanceolate or linear leaflets. Invo- 

 lucre nearly none : involucels of numerous small leaflets. Flowers white. 

 (Name applied to this poisonous umbelliferous plant in fanciful allusion, to 

 Archemonis, who is said to have died from eating parsley. DC.} 



1. A. rigidcl, DC. Leaves simply pinnate; leaflets 3-9, varying from 

 lanceolate to ovate-oblong, entire or remotely toothed, or, in Var. AMiif G UA, 

 linear, long and narrow. Sandy swamps, N. Jersey and W. New York to 

 Michigan, Illinois, and southward. Aug. Stem 2 -5 high. 



1O. TIEDEITIA^nVIA, DC. FALSE WATER-DROPWORT. 



Calyx 5-toothed. Fruit with a single winged margin, obovate, flattish ; the 

 carpels with 5 equidistant slender ribs on the convex back : oil-tubes one in each 

 interval, and 2 on the inner face. A smooth and erect aquatic herb, with a 

 hollow stem (2 -6 high), and cylindrical pointed and hollow petioles (the 

 cavity divided by cross partitions) in place of leaves. Involucre and involucels 

 of few subulate leaflets. Flowers white. (Dedicated to the anatomist, Prof. 

 Tiedeniann, of Heidelberg.) 



1. T. tcrctiiolia, DC. Virginia (Harper's Ferry) and southward. Aug. 



11. ANGELICA, L. ANGELICA. 



Calyx -teeth obsolete. Fruit flattened, with a double-winged margin at the 

 commissure ; i. e. the lateral rib of each oval carpel expanded into a wing, their 

 flattish backs each strongly 3-ribbed : an oil-tube in each interval, and 2-4 on 

 the inner face. Seed adherent to the pericarp. Stout herbs, more or less aro- 

 matic, with first temately, then once or twice pinnately or temately divided 

 leaves, toothed and cut. ovate or oblong leaflets, large terminal umbels, scanty 

 or no involucre, and small many-leaved involucels. Flowers white or greenish. 

 Petioles membranaceous at the base. (Named angelic, from its cordial and 

 medicinal properties. ) 



1. A. Curtisii, Buckley." Nearly glabrous; leaves twice ternate or the 

 divisions quinate ; leaflets thin, ovate or ovate-lanceolate, pointed, sharply cut 

 and toothed; involucels of small subulate leaflets; wings of the fruit broad. 

 1C Mountains of Peiin. (Prof. Porter), Virginia, and southward in the Alle- 

 ghauies. Aug. 



12. ARCHAI\CtEL,ICA, Hoffm. ' ARCHANGELICA. 



Calyx-teeth short. Seed becoming loose in the pericarp, coated with numer- 

 ous oil-tubes which adhere to its surface. Otherwise as in Angelica, from which 

 the species have been separated. 



1. A. llirsitta, Torr. & Gr. Woolly or downy at the top (2 -5 high), 

 rather slender; leaves twice pinnately or ternately divided ;. leaflets tliic'kislx, 



