UMBELLIFER^E. 145 



11. BUPLEURUM. Linn. 



Calyx with the margin obsolete. Petals roundish, entire, 

 involute. Fruit laterally compressed or subdidymous, crown- 

 ed with the depressed style. Carpels with 5 winged acute, 

 filiform or obsolete ribs ; lateral ribs marginal, Leaves most- 

 ly simple. Umbel compound. Involucre various. Flowers 

 yellow. Pentandria. Digynia. 



B. rotundjfotium Linn. : stem leaves perfoliate, roundish-ovate : um- 

 bel 5-rayed ; general involucre none ; partial one of 5-mucronate leaf- 

 ets. B. perfoliatum Lam. 



HAB. Near cultivated grounds. . Introduced, but apparently 

 growing wild near North Salem, Westchester co. N. Y. Dr. 

 Samuel B. Mead. 



12. jETHUSA. Linn. 



Calyx with the margin obsolete. Petals obovate, emar- 

 ginate, inflexed. Fruit ovate-globose. Carpels with 5 ele- 

 vated, thick and acutely keeled ribs ; the lateral ribs margined 

 and a little broader, and surrounded by a somewhat winged 

 keel. Leaves much divided. General involucre none or 1- 

 leaved ; partial one 1 3 or 5 leaves. Flowers white. 



Pentandria. Digynia. 



JE. cynapium Linn. : leaves bi- and tri-pinnate, dark green; segments 

 ovate-lanceolate ; umbels terminal. 



HAB. Road sides, &c. Boston, probably introduced. Big. July, 

 Aug. $j. Stem about a foot high, smooth. Flowers white, in 

 many rayed umbels Said to resemble Conium maculatum, but 

 is smaller. Poisonous. Fool's Parsley. 



13. CNIDIUM. Cuss. DC Cand. 



Calyx with the margin obsolete. Petals obovate, emargin- 

 ate, reflexed. Fruit roundish in the transverse section. Car- 

 pels with 5 equal winged ribs ; wings membranaceous ; late- 

 ral ribs margined. General involucre various ; partial one 

 many-leaved. Flowers white or reddish. Allied to Seseli, 

 but differs, in the membranaceous-winged ribs of the fruit, and 

 the obsolete margin of the calyx. Pentandria. Digynia. 



T. canadensis Spreng. : stem angular, flexuous; leaves bipinnate, 

 shining ; leafets many-parted ; segments lanceolate ; involucres many- 

 leaved. Sclinum canadense Mich. Pursh. Apium bipinnatum Walt. 

 HAB. Banks of streams. Can. to Car. July. If. Flowers 

 white. Pursh. 



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