380 Order C3.— UMBBLLIJ'EE^. 



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

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

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

 Invol. deciduous. Involucels many-leaved. 



H. lanatum L. Lva. ternate, petiolate, tomentous benoath, Ifts. petioled, round- 

 cordate, lobed ; fr. orbicular. — Peao. to Lab., "W. to Oregon. A largo, coarsi>- 

 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, tho:-cj 

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



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

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

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

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

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

 seeds flat. — i( Invol. or few-leaved. Involucels many-leaved. 



1 A. rigida DO. "Wateb Dropwoet. Cowbane. St. rigid, striate, smooth ; lvs. 

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

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

 La. St. 2 to 4X 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. I'r. 

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

 missuro white. Sept. — Said to be poisonous. (CEnauthe Nutt.) 



fi. AMBIGUA. Lfts. long-linear, mostly entire. (Qilnanthe ambigua Nutt.) 



2 A. tern^ta Nutt. Lvs. temately divided, with very long petioles ; segm. 

 linear. — Margins of swamps in the pine forests, N. to S. Car. Near Newbem 

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

 l?ruit as large as that of the parsnip. 



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

 <'/alyx 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. — If 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 winga. Aug., Sept. 



iO. ANGELICA, 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 vittas ; carpophore 2-parted ; seed semiterete. — Lvs. bi. 

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

 cels many-leaved. 



A. Ctirtisii Buckley. Lvs. biternata or with 3 quinate divisions ; Ifta. thin, ovato 

 or lance-ovate, acuminate, sharply and ineisely toothed ; bracts of the involuccl 

 small, subulate; wings of the fruit broad. — 1( Mts. of Asho Co., N. Car. (Cur- 

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



il. ARCHANGEL'ICA, Hofi"m. Angelica. (Named for its pnv 

 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, 



