ORDER 63. UMBELLIFER^E. 337 



erect. Lvs. finely divided. Umbels pedunculate, few-rayed. Invol. ; 



involucel few-leaved. Fls. minute, white. 



L. divaricatus DC. Umbels (very small) 3 to 5-rayed, lateral and terminal; in- 

 volucel Ivs. divided, shorter than the very short pedicels; fr. muricated with short, 

 whitish, erect scales. Dry sandy soils, S. Car., Ga. Sts. 2 to 8' high. An insig- 

 nificant weed. Mar., Apr. 



30. DISCOPLEU'RA, DC. BISHOP-WEED. (Gr. diono^ the disk, 

 Tr'/.evpd, a rib ; that is, the disk and ribs (of the fruit) united.) Calyx 

 teeth subulate, persistent ; petals ovate, entire, with a minute, inflexed 

 point; fruit ovate, often didymous; carpels 5 ribbed, the 3 dorsal ribs 

 filiform, subacute, prominent, the 2 lateral united, with a thick, acces- 

 sory margin ; intervals with single vitta? ; seeds subterete. (j) Lvs. ca- 

 pillaceous-dissected. Umbels compound. Bracts of the invol. cleft. 

 Fls. white. 



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

 invol. 3 to 5, mostly 3-clefl; fr. ovate. In swamps near the coast, Mass, to Ga. 

 St. much branched, 1 to 2f high. Lvs. very smooth, ternately dissected, with 

 filiform, spreading segm. Umbels axillary and terminal, pedunculate, spreading. 

 Invo!. Ifts. about 3, with setaceous segm. Involucels filiform, longer than the um- 

 bellets. Ju. Sept. (Ammi, Spreng.) 



2 D. costata. Branched, erect; umbels 7 to 15-rayed; bracts of the invol. 10 to 

 12, 2 to 5-parted; If. -segm. filiform, numerous, apparently verticiUate ; fr. with ribs 

 and vittce strongly contrasted. Swamps, Ogeechee R. to the Miss., n,ore comiron 

 than Xo. 1, which prevails northward. St. stouter, 1 to 2f high. The coiky riba 

 and persistent sepals conspicuous ou tho ovate fruit. Oct., Nov. (Ammi costa- 

 tum Ell.) 



3 D. Nuttallii DC. Erect, tall; umbels 15 to 20-rayed; invol. few-bracted, 

 bracts entire ; fr. as broad as long. Wet prairies, Ky. to Fla. and La. Sts. 2 to 

 6f high, branched above. Lvs. few, but with numerous capillaceous segm. In- 

 vol. not half as long as tho rays; involucels minute. Umbels near 2' broad. 



31. NEUROPHYL'LUM, Torr. & Gray. (Gr. vevpov, a nerve (vein), 

 >, leaf; leaves prominently veined.) Calyx limb of 5 lanceolate, 



persistent teeth ; petals obovate, joint indexed ; stylopodium conical ; 

 fruit laterally compressed, ovate ; ribs filiform, slight ; intervals with 3 

 vitta?, commissure with 4; seed teretely plano-convex. 2 Tall, slen- 

 der^ smooth. Lvs. ternate, segm. very long, linear, entire, 3-veined. 

 Umbels perfect. Invol. to 3-leaved ; involucel 4 to 6-leaved. Fls. 

 white. (The same as Archemora ternata Nutt. ?) 



N. longifolium Torr. & Gr. Swamps, X. Car. to Fla, (Chapman). St. 3 to 4f 

 high, branched above, very slender. Rt. Ivs. 12 to 18' long, the regm. much 

 shorter than the petioles. Umbel 5 to 7 -rayed, rays very slender. Bracts of in- 

 vol. and involucel subulate, very short. Sept. 



32. SrUM, L. WATER PARSNIP. (Celtic siw, water; that is, a 

 genus of aquatic plants.) Calyx margin 5-toothed or obsolete; petals 

 obcordate, with an inflexed point ; fruit nearly oval ; carpels with 5 

 obtusish ribs, and several vittse in each interval ; carpophore 2-parted. 

 2 Aquatic. Lvs. pinnately divided. Umbels perfect, with partial 

 and general many-leaved invol ucra. Fls. white. 



1 8. latifolium L. St. angular, silicate; Ifts. oblong-lanceolate, acutely and 

 coarsely serrate, acute; cal. teeth elongated A tall plant in swamps and ditches, 

 K J. ? to Ind. and Can. St. 3 to 4f high, smooth, hollow, with deep-furrowed 

 and prominent angles. Lfts. or segm. 4 to 6' lonj, 1 to 2' broad, in 3 to 5 pairs, 

 with a sessile odd one, each with about 10 large, sharp teeth. Umbels very 



