Obdeb 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, lfts. 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 ohanneled stalk3. 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 ; 

 eeeds flat. — !(■ Invol. or few-leaved. Involucels many-leaved. 



1 A. rigida DC. "Water Dropwort. Cowbane. St. rigid, striate, smooth ; lvs. 

 pinnately divided, smooth, lfts. 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 vittse filling the intervals. Com- 

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



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



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

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

 (Nuttall). St. 2 to 3f high, slender. Lvs. and petioles 2f long; aegm. 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 largo vittse, commis- 

 sure with 2 ; seed flat. — U Smooth, tall, slender. Lvs. reduced to fls- 

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



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

 Phyllodia 6 to 16' long, tapering, tho joints 1' apart. Fr. as large as in parsnjp, 

 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 semiterete. — Lvs. bi. 

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

 cels many-leaved. 



A Curtfsii Buckley. Lvs. biternate or with 3 quinate divisions ; lfts. thin, ovate 

 or lance-ovate, acuminate, sharply and incisely toothed ; bract3 of the involucel 

 email, subulate; wings of the fruit broad. — l^ Mts. of Ashe Co., N. Car. (Cur- 

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



11. ARCHANGEL'ICA, Hoffm. Angelica. (Named for its pro- 

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

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

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

 ©nes dilated into membranous wings ; seed loose in the ripe carpel. 



