286 LXVII. UMBELLIFER^E. CICUTA. 



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

 Jl.' Aug. 



5. DISCOPLEURA. DC. 



Gr. Jtffrfo?, the disk ; n\evpa, a rib ; i. e. the disk and ribs (of the fruit) united. 



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

 nute, inflexed point ; fruit ovate, often didymous ; carpels 5-ribbed, 

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

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

 terete. CD Lvs. much dissected. Umbels compound. Bracts of the in- 

 volucre cleft. Fls. white. 



D. CAPILLACEA. DC. (Ammi. Spreng.) Bishop-weed. 



Erect or procumbent; umbels 3 10-rayed; Ifts oftJie 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. 



Gr. POVS, an ox, ir\evpov, 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. mostly simple. Invol. various. 

 Fls. yellow. 



B. ROTUNDIFOLIUM. Modesty. Thorough-wax. 



L/vs. roundish-ovate, entire, perfoliate ; 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. ! rare. 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- 

 podium). 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 vittse, com- 

 missure with 2 vittse ; carpophore 2-parted ; seeds terete. ^ Aquatic 

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

 Invol. few-leaved or 0. Involucels many-leaved. Fls. white. 



1. C. MACULATA. Water Hemlock. Spotted Cowbane. 



St. streaked with purple ; lower Ivs. triternate and quinate ; upper biter- 

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

 Common in wet meadows, U. S. and Can. Stem 3 6f high, smooth, striate, 

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

 abrupt, clasping stipules. Leaflets or segments 1 3' long, f 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 1%" diam., 10-ribbed, crowned with the permanent calyx and 

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

 used in medicine. 



2. C. BULBIFERA. Bulbiferous Cicuta. Narrow-leaved Hemlock. 



Axils of the branches bulbiferous ; Ivs. biternately divided ; Ifts, linear, with 

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



