340 PKNTANDRIA DIGYNIA. 



138. CNIDIUM. 



C. canadense : stem angular, flexuous ; leaves bipinnate, shining 



leaflets many-parted ; segments lanceolate. 

 HAB. Mouths of rivers. 

 C. atropurpureum : radical leaves subcordate, simple, serrate , cau- 



line ones ternate ; leaflets ovate, acute subcordate ; middle one peti- 



olate ; partial involucra dimidiate, 3-leaved. 

 HAB. Rocky banks of rivers. June, 1\. ; stem 2 3 feet high ; 



Jlower dark purple. 



139. SMYRNIUM. Alexanders. 



fc>. cordatum : radical leaves simple, cordate, crenate ; stem-leaves ter- 

 nate, serrate ; umbels terminal. 



HAB. Rocky hills. May June, 7j_; stem 2 3 feet high; radical 

 leaves on long petioles ; Jlowers yellow ; fruit black. 



140. CICUTA. 



C. maculata: stem spotted; leaves triternate; leaflets subternate, 

 lanceolate, acuminate, mucronately-serrate ; umbels axillary and 

 terminal ; partial involucra setaceous. 



HAB. Wet places. July Aug. 1J- ; stem 36 feet high, glauc., 

 umbel large, slender ; Jlower white. Poisonous. 



C. bulbifera : leaves various, ternate and biternate, bulbiferous ; leaf- 

 lets linear and linear-lanceolate, remotely toothed ; umbels terminal, 

 solitary. 



HAB. Swamps. Aug. Q ; stem 23 feet high, slender, bulbifer- 

 ous in the axils. ; umbels small ; Jlowers white. 



141. DAUCUS. Carrot. 



D. Carota: stem hispid; leaves tripinnate; leaflets incised, linear- 

 lanceolate, acute ; umbel at length concave ; fruit bristly. 



HAB. Old fields. June Aug. $ ; stem 2 feet high; leaves pale 

 green, Jlowers white. 



142. MYRRHIS. 



M. Claytoni : stem hairy, (at first hoary white ;) leaves biternate, 

 pubescent ; leaflets incisely lobed, dentate ; umbel 3-rayed ; central 

 flowers abortive ; universal and partial involucra 3 5- leaved, lan- 

 ceolate, ciliate ; fruit attenuate at the base, with hispid angles, not 

 rostrate ; style very short. 



HAB. Shady rocky places. May June, 7]. ; root fusiform ; stem 2 

 feet high ; fruit linear-lanceolate, blackish. 



M. canadensis : leaves ternate, smooth ; leaflets rhomboid-ovate, acute, 

 incisely toothed, acutely serrate; partial involucra minute, subulate ; 

 fruit oblong, very smooth. 



HAB. Rocky woods. June, 7J.; stem 1J 2 feet high, erect, smooth 

 -umbels num. ; fr. 3 lin. long. 



