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 vitta9 ; 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. orbicular. 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, white, those 

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



8. ARCHEMO'RA, DC. (A fanciful name from Archemorus, who, 

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

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

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

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

 seeds flat. i| Invol. or few-leaved. Involucels many-leaved. 



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

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

 motely toothed, sessile ; umbels spreading, smooth. Swamps, Mich, to Fla. and 

 La. St. 2 to 4f high, slender, terete. Lfts. 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 vittae filling the intervals. Com- 

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



/?. AMBIGUA. Lfts. long-linear, mostly entire. ((Enanthe ambigua Nutt.) 



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

 linear. Margins of swamps in the pine forests, 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 the parsnip. 



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

 Calyx limb 5-toothed ; 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 vittse, commis- 

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

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



T. teretifolia DC. Va. to La. and Fla. St. 3 to Gf high, hollow, round, striate. 

 Phyllodia 6 to 16' long, tapering, the joints 1' apart. Fr. as large as in 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 vittaj ; carpophore 2-parted ; seed serniterete. Lvs. bi. 

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

 cels many-leaved. 



A. Curtisii Buckley. Lvs. biternate 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. 2{ Mts. of Ashe Co., N. Car. (Cur- 

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



11. ARCHANGEL'ICA, Hoflm. 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, 



