■286 LXVII. UMBELLIFER^. Cicuta. 



er. Heads numerous, less than 1' diam. Flowers pale blue or nearly white. 

 Jl. Aug. 



5. DISCOPLEURA. DC. 



Gr. Sia<os, the disk ; nXcvpa, a rib; i. e. the disk and ribs (of the fruit) united. 



Calyx teetli subulate, persistent ; petals ovate, entire, with a mi- 

 nute, infiexed point ; fruit ovate, often didyinous ; carpels 5-ribbed, 

 the 3 dorsal ribs filiform, subacute, prominent, the 2 lateral united, 

 with a thick accessory margin ; intervals with single vittae, seeds sub- 

 terete. — (D ZjVS. much dissected. Umbels compound. Bracts of the in- 

 volucre cleft. Fls. white. 



D. CAPiLLACEA. DC. (Ammi. Sprang.) Bishop-weed. 

 Erect or procumbent; ■umbels 3 — lO-rayed; Ifts of Vic invol. 3 — 5, mostly 3- 

 cleft; fr. ovate. — In swamps near the coast, Mass.! to Ga. Stem much 

 branched, 1 — 2f high. Leaves very smooth, ternately dissected, with subulate, 

 spreading segments. Umbels axillary, pedunculate, spreading. Involucre leaf- 

 lets about 3, with setaceous segments. Involucels filiform, longer than the um- 

 bellets. Jl. — Nov. 



6. BUPLEURUM. Tourn. 



Gl'. 0OVS, an ox, ■iT\tvpov, a rib ; from the ribbed (veined) leaves of some of the species. 



Calyx margin obsolete ; petals somewhat orbicular, entire, with a 

 broad, closely inflexed point ; fruit laterally compressed ; carpels 5- 

 ribbed, lateral ones marginal ; seed teretely convex ; flattish on the 

 face. — Herbaceous or shrubby. Lvs. viosthj simple. Invol. various. 

 Fls. yellow. 



B. ROTUNDiroLiuM. AL^dcshj. Thfli-ovgh-u-ax. 



Lvs. roundish-ovate, entire, perlbliate ; invol. ; involucels of 5, ovate, 

 mucronate bracts ; fr. with very slender ribs, intervals smooth, mostly without 

 vittse. — In cultivated grounds and fields, N. Y. and Penn. and la. ! raie. Stem 

 If or more high, branching. Leaves 1 — 3' long, f as wide, rounded at base, 

 acute at apex, very smooth. Umbels 5 — 9-rayed. Involucels longer than the 

 umbellets. Fruit crowned with the wax-like shining base of the styles (stylo- 

 podimn). Jl. Aug. 



7. CICUTA. 



A Latin name used by Virgil (Ec. 2d and 5th) but of unknown application. 



Calyx margin of 5, broad segments ; petals obcordate, the points 

 inflected ; fruit subglobose, didymous ; carpels with 5 flattish, equal 

 ribs, 2 of them marginal ; intervals filled with single vittje, com- 

 missure with 2 vittoi ; carpophore 2-parted ; seeds terete. — %- Aquatic 

 poisonous herbs. Leaves compound. Stems lioUow. Umbels perfect. 

 J)ivol. few-leaved or 0. Involucels many-leaved. Fls. ichite. 



1. C. MACULATA. Watcj Hemloclc. Spotted Coxclanc. 



S/. streaked with purple; lower Zt-5. triternate and quinate ; upper biter- 

 nate ; segments lanceolate, mucronately serrate; aimbels terminal and axillary. 

 — Common in wet meadows, U. S. and Can. Stem 3 — Gf high, smooth, striate, 

 jointed, hollow, glaucous, branched above. Petioles dilated at base into long, 

 abrtipt, clasping stipules. Leaflets or segments 1 — 3' long, { — f wide, finely 

 serrate, the veins mostly running to the notches, rarely to the points ! Umbels 

 rather numerous, naked, 2 — 4' broad. Involucels of 5 — G short, narrow, acute 

 bracts. Fruit IJ" diam., lO-ribbed, crowned with the permanent calyx and 

 stvies. Jl. Aug. — The thick, fleshy root is a dangerous poison, but sometimes 

 used in medicine. 



2. C. BULBIFEHA. Bvlbferous Cicuta. Narrow-leaved Hemlock. 



Axils of the branches bulbilerous ; /r5. biternately divided ; Ifts, linear, with 

 remote, divergent teeth; mnbcls terminal and axillary. — In wet meadows. Penn. 



