ORDER 63. UMBELLIFEILE. 141 



26. EULOPHUS, N. Calyx limb 5-toothed, deciduous. Fr. contracted 

 laterally, somewhat double. Carpels surrounded with large vittae, riba 

 obsolete. Seed channelled on the inner face, it Smooth, branched. Lvs. 

 ternately decompound. Invol. nearly 0. Involucel setaceous. Fls. white. 

 E. Americana N. Lvs. mostly radical ; segm. lance-lin., V long, acnte, upper Ivs. in 



3 long, entire seg. ; umb. long-stalked, 3-10-rayed. Prairies, O. to 111. and Tenn. 3 if. 



27. CICUTA, L. WATER HEMLOCK. Calyx margin of 5 broad seg- 

 ments. Fr. subglobous, didymous. Carpels with 5 flattish, equal ribs, 2 

 of them marginal, intervals filled with single vittae. Seeds terete. ? it 

 Poisonous. Leaves compound. Stems hollow. Umbels perfect. Invol. 

 few-leaved or 0. Involucels many-leaved. Flowers white. 



1 C. macnlata L. St. streaked with purple; lower Ivs. triternate and qninate, up- 



per biternate ; segments lanceolate, mucronately serrate, the veins running to the 

 notches. Wet meadows. 3 6f. Smooth, glaucous. Leaflets 1 3'. Fruit W, 10- 

 ribbed. Umbels 3'. July, August. 



2 C. bulblfera L. Lvs. biternate ; Ifts. linear, with remote, divergent teeth ; Ivs. of 



the branches 3-cleft or simple, subopposite, bearing bulblets in their axils. Swamps, 

 Can. to Penn. and W. 3 4f. Leaflets 24' by 1-^1". Umbels few. August. 



28. SIUM, L. WATER PARSNIP. Calyx teeth acute. Pet. obcordate, 

 with an inflexed point. Fr. nearly oval, laterally compressed. Carpels 

 with 5 obtusish ribs, and several vittae in each interval. Carpophore undi- 

 vided. It Leaves pinnate, dentate. Umbels perfect, with many-leaved 

 involucra. Flowers white. Stout herbs. 



S. latifolium L. St. angular, silicate; Ifts. oblong-lanceolate, acutely and coarsely 

 serrate, barely acute ; cal. teeth conspicuous. Swamps, Ind. (Green Co. !) and Can. 

 3-4f. Lfts. 4 ^ by 12', 2-10-toothed. Umb. with 2030 long (3-40 rays. Jl., Aug. 



29. DISCOPLEURA, DC. BISHOP-WEED. Cal. teeth subulate, per- 

 sistent. Fr. ovate, often didymous. Carp. 5-ribbed, the 3 dorsal ribs fili- 

 form, subacute, prominent, the 2 lateral united with a thick, accessory 

 margin ; intervals with single vittae. Sds. subterete. (i) Lvs. capillaceous 

 dissected. Umbels compound. Bracts of the in vol. cleft. Fls. white. 



1 D. capillacea DC. Erect or procumbent ; umbels 3-10-rayed ; Ifts. of the invol. 



3 5, mostly 3-cleft ; fr. ovate. Swamps near the coast. Mass, to Ga. 1 2f. June+. 



2 D. costata Hale (1850). Branched, erect ; umbels 7-15-rayed ; bracts of the invol. 



1012, 2-5-parted ; If.-segm. filiform, numerous, apparently verticillate ; fr. with riba 

 and vittae strongly contrasted. Swamps, Ogeeohee R. and W. 1 2f, stout. Oct., Nov. 



3 D. Niittailii DC. Erect, tall ; umbel 15-20-rayed ; invol. few-bracted, bracts en 



tire ; fr. broadly cordate-ovate. Wet prairies, Ky. and S. Slender, 2 if. 



30. CORIANDRUM, L. CORIANDER. Cal. with 5 conspicuous teeth. 

 Outer petals radiant, inflex-bifid. Fr. globous. Carp, cohering, with the 

 5 depressed, primary ribs, and 4 secondary more prominent ones, seeda 

 concave on the face. (T) Smooth. Invol. or 1-leaved. Involucels 3 

 leaved, unilateral. 



C, sativuin L. Lvs. bipinnate, lower ones with broad-cuncate Ifts., upper with ilu 

 ear Ifls. ; carp, hemispherical. Europe. 2f. Cultivated for its spicy fruit. 



