380 ORDER 63. UMBELLIFER^E. 



exterior flowers, and apparently deeply 2-cleft ; fruit compressed, flat, 

 with a broad, flat margin, and 3 obtuse, dorsal ribs to each carpel ; in- 

 tervals with single vittse ; seeds flat. Stout herbs with large umbels, 

 Invol. deciduous. Involucels many-leaved. 



H. lanatum L. Lvs. ternate, petiolate, tomentous beneath, Ifts. petioled, round- 

 cordate, lobed ; fr. orbicuhr. Penn. to Lab., W. to Oregon. A large, coarse- 

 looking plant in moist cultivated grounds. Sts. about 4f high, thick, furrowed, 

 branching, with spreading hairs. Lvs. very large, on channeled stalks. Lfts. 

 irregularly cut-lobed and serrated. Its huge umbels are often a foot broad. In- 

 volucre of lanceolate, deciduous leaflets. Petals deeply heart-shaped, whit3, those 

 of tho outer fls. unequally enlarged (radiate). Jn. 



8. ARCHEM(TRA, DC.- (A fanciful name from Archemorus, who, 

 according to mythology, died from swallowing a bee.) Calyx limb 

 5-toothcd ; petals obcordate with an inflexed point ; fruit oval, lenticu- 

 lar, compressed on the back ; carpels with 5 rib?, marginal ones broadly 

 winged ; intervals with single large vittrc, commissure with 4 or 6 ; 

 seeds flat. U Invol. or few-leaved. Involucels many-leaved. 



1 A. rigida DC. WATER DROPWORT. COWBANE. St. rigid, striate, smooth ; Ivs. 

 pinnately divided, smooth, Ifts. 3 to 11, oblong-lanceolate or ovate, entire or re- 

 motely toothed, sessile ; umbels spreading, smooch. Swamps, Mich, to Flu. and 

 La. St. 2 to 4f high, slender, terete. Llts. 2 to 4' by 3 to 9", varying in outline 



in the same plant. Umbels 2 to 3, of many slender rays. Petals white. Fr. 

 with subequal, greenish ribs, and large purple vittee filling the intervals. Com- 

 missure white. Sept. Said to be poisonous. (CEnanthe Nutt.) 



/8. AMBIGUA. Lfts. long-linear, mostly entire. (OEnanthe ambigaa Nutt.) 



2 A. ternata Nutt. Lvs. ternately divided, with very long petioles; segm. 

 linear. Margins of swamps in tho pine forest?, N. to S. Car. Near Newbern 

 (Nuttall). St. 2 to 3f high, slender. Lvs. and petioles 2f long; segm. 3" wide. 



Fruit as large as that of tho parsnip. 



9. TIEDEMAN'NIA, DC. (To Prof. Tiedemann, of Hiedelburg.) 

 Calyx limb 5-toothcd ; petals roundish ovate ; fruit flattened dorsally, 

 obovate ; carpels with 5 equal, filiform ribs, the lateral coalescing with 

 the broad, marginal wings ; intervals with single large vittae, commis- 

 sure with 2; seed flat. 11 Smooth, tall, slender. Lvs. reduced to fis- 

 tular-jointed phyllodia. Involucra subulate, 5 to 6-lvd. Fls. white. 



T. teretifdlia DC. Va. to La, and Fla. St. 3 to 6f high, hollow, round, striate. 

 Phyllodia 6 to 16' long, tapering, the joints 1' apart. Fr. as large as iu parsnip, 

 disk dark brown, not wider than the yellowish wings. Aug., Sept 



10. ANGEL'ICA, L. (Named for its excellencies.) Calyx teeth ob- 

 solete ; petals lanceolate, acuminate ; fruit dorsally compressed ; car- 

 pels 5-ribbed, the 3 dorsal ribs filiform, the 2 marginal winged, inter- 

 vals with single vitta3 ; carpophore 2-parted ; seed semiterete. Lvs. bi. 

 or triternate, sessile, umbels terminal. Invol. or few-leaved. Involu- 

 cels many-leaved. 



A. Curtfsii Buckley. Lvs. biternato or with 3 quinate divisions; Ifts. thin, ovate 

 or lance-ovate, acuminate, sharply and incisely toothed ; bracts of the involucel 

 small, subulate ; wings of the fruit broad. If Mts. of Ashe Co., N. Car. (Cur- 

 tis.) Cheat Mt, Va. (Buckley.) Aug. 



11. ARCHANGEL'ICA, Hoffm. ANGELICA. (Named for its pre- 

 eminence in size and virtues.) Calyx teeth short ; petals elliptical, en- 

 tire, lanceolate, acuminate, with the point inflexed ; fruit dorsally com- 

 pressed, with 3 carinate, thick ribs upon each carpel, and 2 marginal 

 ones dilated into membranous wings ; seed loose in the ripe carpel, 



