150 DICOTYLEDONOUS PLANTS. 



attenuated at base, solid, acute-angled, in the transverse sec- 

 tion roundish. Carpels with hispid angles and 5 acute ribs ; 

 commissure sulcate. General involucre 2 3-leaved ; partial 

 one often 5-leaved. Flowers white ; central ones sterile ; outer 

 ones fertile. Pentandria. Digynia. 



1. O. longistyUs De Cand. : stem smooth and striate ; leaves biter- 

 nate ; the lower ones on short petioles ; leafets ovate, incisely lobed 

 and dentate ; umbel 3 4-rayed. Myrrhis longistylis Torr. Uraspcr- 

 mum claytoni Nutt. Scandix dulcis M\M. 



HAB. Wet meadows. N. S. June. It. Stem 3 feet high. 

 Can be most easily distinguished by its long subulate styles. 



2. O. brevistylis De Cand. : stem hairy (at first hoary- white) ; leaves 

 biternate, pubescent ; leafets incisely lobed, dentate ; umbel 3- rayed ; 

 styles very short. Myrrhis claytoni Torr. Uraspermum hinmtum Big. ? 



HAB. Shady rocks. Can. to Car. May, June. 11. Stem 2 

 feet high. Flmoers white. Whole plant sweet tasted. 



Siceet Cicilij. 



23. CONIUM. Linn. 



Calyx with the margin obsolete. Petals obcordate, some- 

 what emarginatc, very short and inflexed. Fruit ovate, late- 

 rally compressed. Carpels with 5 prominent equal, undulate 

 ribs ; the lateral ribs margined. Involucres 3 5-leaved ; 

 partial one dimidiate. Flowers white, all fertile. 



Pentandria. Digynia. 



C. maculatum Linn. : stem erect, branched, smooth and spotted ; 

 leaves large, tripinnate ; leafets lanceolate, pinnatifid ; ultimate seg- 

 ments lanceolate, mostly entire ; general and partial umbels many- 

 rayed ; general involucre of several short lanceolate leaves ; partial 

 one few-leaved, setaceous, directed to one side. 



HAB. Roadsides. Can. and N. S. July, 0". Stem 2 4 feet 



high. Leaves smooth and shining. Flowers white, numerous. 



Probably introduced. Whole plant highly poisonous ; fetid 



when bruised. Medicinal. Big. Med. Sot. i. 113. Raf. Med. 



Fl. i. 118. Hemhck. 



ORDER LIX. ARALIACE^. De Cand. Lind. 



Calyx superior, entire or toothed. Petals definite, 5 or 6, 

 deciduous. Stamens definite, 5 or 6 or 10 or 12, arising from 

 within the border of the calyx, and from without an epiginous 

 disk. Ovary inferior, with many cells ; ovules solitary, pen- 

 dulous ; styles equal in number to the cells ; stigmas simple. 

 fruit succulent or dry, consisting of several 1-seeded cells. 

 Seeds solitary, pendulous. 



