OF NORTH AMERICA 35 



gidium, belongs to the same subgenus. 



784. DAUCUS SCARIOSUS Raf. stem grooved 

 foliose retrose pilose, leaves 2-3pinnate, seg- 

 ments lanceolate acuminate or cuspidate ; invo- 

 lucres 6-8 foliose bipinnate, partial unequal 

 lanceolate white scariose, longer than flowers, 

 some trifid. Annual or biennal root not odor- 

 ous, leaves long and narrow, nerved. Var. sim- 

 plex simple stem pedal, a single umbel, hardly 

 hispid Var. ramosus branched hirsute, invo- 

 lucres hardly bipinnate, very long segments 

 sometimes trifid. Found by myself in the glades 

 of Pennsylv. autumnal, petals apparently not 

 radiate, thus a Gingidium also. 



785. DAUCUS BREVICAULIS R. Scabrous, stem 

 nearly naked, lower leaves nearly as long tri-< 

 pinnate, segments confluent oblong bifid mucro- 

 nate ; involucres mostly trifid base scariose on 

 the margin, linear elongate, partial linear and 

 trifid shorter than flowers, petals radiate. A 

 singular sp. found in hills of Pennsylvania and 

 near Philadelphia, with ample leaves 6 to 8 

 inches long nearly as long as the stem, with 

 broad segments, roots biennial hardly odorous 

 branched. 



786. DAUCUS NUDTCAULIS Raf. smooth, sub- 

 scapose, scape naked grooved, leaves radical 

 bipinnate segments linear laciniate cuspidate ; 

 umbel lax, involucres 3-5fid setaceous, partial 

 linear equal to flowers, margin scariose, petals 

 radiate found with the last, perhaps a devia- 

 tion, but it has another deviation var. pumila 

 only 3 inches high, leaves larger than umbel 

 quite linear while the nudicaulis is 6 to 8 

 inches high, with short leaves 3 inches long, root 

 white tapering slender. 



787. DAUCUS LEVIS R. Quite smooth, stem 



