191 PENTANDUIA BlGYNIA 



pair confluent at base, the terminal one sessile, or subpetiolatv? ; umbels 

 globose, anc3, with the peduncles, smoothish. Beck, But. p. 147. 

 A. triquinata. BigeL Bost.p. 110. 



Dark purple Angelica. 



Root perennial. Stctn\ to 6 feet high, and 1 to 2, sometimes nearly 3, inches u- 

 diameter at base, somewhat branching above, terete, striatcly grooved, smooth 

 throughout and dark purple, with something of a glaucous mealiness. Lower 

 leaves large, and somewhat triternately compounded. ( pper ) or stem leaves, most- 

 ly biternate, on very broad inflated petioles (1 to 2 inches wide). Leaflet* 2 to $ 

 inches Long, and 1 to 2 and a half inches wide 4 , lance-ovate, or oblong-ovate, acute, 

 often somev hat acuminate, unequal at base smooth, thin and rather membranace- 

 ous, paler or slightly glaucous beneath, general 1) sessile, the lateral ones often 

 with a large lobe; the outermost pair completely united at base and decurrent on 

 the. common petiole; the terminal odd one broad-ovate, acute, often some what 3-lob- 

 ed, abruptly narrowed at base, sessile, or often tapering to a short petiole,— some- 

 times the 3 terminal leaflets are completely confluent at base. Umbels large at 

 length globose, 6 to 10 or 12 inches in diameter,- or the r&ys 3 to 5 or 6 inches long,— 

 sometimes a large central ray over-topping the others; rays striate. silicate, with 

 acute ridges, which are minutely scabrous on the edges. Involucre 0. Umbellets 

 globose, I to 2 inches in diameter; rays minutely Bcabrous. Involucels subulate* 

 iiliform, much shorter than the rays of the umbellets,— the leaves often near the 

 middle of the rays, instead of at the base. Calyx obaoletely 5-toothed. Petals 

 greenish white, oval, with a subulate acumi nation which is indexed, or sometimes 

 only incurved. Fruit broad-ell if >tic, smooth, crowned with the depressed dilated 

 tease of the erect or di verging styles. Carpels with 3 prominent approximated dor- 

 sal ribs, the 2 lateral ones dilated into a thickish margin. Commissure with a 

 central longitudinal groove, and 8 vittet. 



Hah. Moist low grounds ; Brandy wine : frequent. Fl. May. Fr. July. 



Obs. The very respectable Author of the Florida Bostoniensis (Dr. Bigelow. 

 contends that this is not the A. atropurpurea, of Lin?ucus. It would ill become me 

 tr> undertake to decide the question ; but, as the American Botanists, generally, 

 njtve united in so considering it,— and Professors l)e Candolle and Hooker havi.- 

 concurred with them,— I have not hesitated in adhering to the name. This is on* 

 of the largest of our umbellifera The whole plant has a heavy disagreeable odor* 

 Vrhen bruised. The root is said to be poisonous* One other species, of somewhat 

 doubtful character, has been enumerated in the U. Slates. 



7. Peucedanum Tribe. Fruit dorsally compressed, dilated at the margin into 

 am apparently single even wing (though formed of 2 margins), not thickened at the 

 etfge. Peucedaxe^. DC. 



149. ARCHEMORA. DC. Prodr. 4./;. 188. 

 .{^emen iantasticum ex Archemoro, qui juxta mythologiam Apio ingesto obiit. DC'] 



Calyx with the limb 5-toothed. Petals orbicular-ovate, with a taper- 

 ing indexed acuminatum. Fruit subelliptic, compressed on the back, 

 Kattish, 0)r lenticular, with a prominent and apparently entire or simple 

 yiargin. Carpels with 5 equidistant obtuse ribs, the 2 lateral one* 

 dilated into a winged margin. Channels filled with single vittse. 

 tfommissure with 2 vittse. Involucre # or few-leaved. Invohtceh 

 Haay-kaved. 



