Order 63.— UMBELLIFEB^. 3 87 



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



involucel few-leaved. Fls. minute, white. 



L. divaricatus DO. Umbels (very small) 3 to 6-rayed, lateral and terminal; in- 

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

 whitish, erect scales. — Dry sandy soils, S. Car., Ga. Sta, 2 to 8' high. An inaig- 

 niflcant weed. Mar., Apr. 



30. DISCOPLEU^RA, DC. Bishop-weed. (Gr. dioKog, the disk, 

 ■nXevpd, 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-iibbed, the 3 dorsal ribs 

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

 sory margin ; intervals with single vittse ; seeds subterete. — (J) Lvs. ca- 

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

 Fls. white. 



1 D. oapillaoea DC. Erect or procumbent; mmhela 3 to 10-rayed; I/It: cftkt 

 invol. 3 to 5, mostly S-ckft; 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. 

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

 bellets. Ju. — Sept (Ammi, Spreng.) 



2 D. cost^ta. Branched, erect; umbels 1 to \5-rayed; hracts of the invol. 10 to 

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

 arid viitce strongly contrasted. — Swamps, Ogeechee R. to the Miss., more common 

 than No. 1, which prevails northward. St. stouter, 1 to 2f high. The corky ribs 

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

 tum Ell.) 



3 D. Nutt^Uii DC. Erect, tall; umbels 15 to 20-rayed; invol. few-braoted, 

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

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

 ToL not half as long as the rays ; involucels minute. Umbels near 2" broad. 



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

 <jrvXXov, loaf; loaves prominently veined.) Calyx limb of 5 lanceolate, 

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

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

 vittsB, commissure with 4 ; seed teretely plano-convex. — 71 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. 



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

 high, branched above, very slender. Rt. lvs. 12 to 18' long, the segm. 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 6-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. — 

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

 and general many-leaved involucra. Fls. white. 



1 S. latifolium L. St. angular, sulcate; Ifts. obleng-lanceolate, acutely and 

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

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

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

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



