GENUS 48. 



CARROT FAMILY. 



6 57 



i. Ptilimnium capillaceum (Michx.) Raf. Mock Bishop-weed. Fig. 3173. 



Ammi majus Walt. Fl. Car. 113. 1788. Not L. 

 A. capillaceum Michx. Fl. Bor. Am. i : 164. 1803. 

 D. capillacea DC. Mem. Omb. 38. 1829. 

 Ptilimnium capillaceum Raf.; Scringe, Bull. Bat. 



217. 1830. 

 P. missouriense Coult. & Rose, Contr. Nat. Herb. 



12 : 444. 1909. 



Slender, i-2 high or more, the branches 

 ascending or sometimes divaricate. Leaves 

 finely dissected into filiform segments, the 

 upper sessile, the lower more or less petioled ; 

 involucral bracts, or some of them, pinnately 

 parted ; involucels of several linear bracts ; 

 umbels 2'-^' broad, 5-2o-rayed, the rays i'-2' 

 long; pedicels 2"-8" long; fruit ovate, acute, 

 i"-ii" long. 



In wet soil, especially brackish meadows, along 

 the coast, Massachusetts to- Florida, west to Texas, 

 north to Kansas and Missouri. June-Oct. Called 

 allso herb-william, wood-nep, bole- or bull-wort. 



2. Ptilimnium Nuttallii (DC.) Britton. Nuttall's Mock Bishop-weed. Fig. 3174. 



Peiicedanum verticillatum Raf. Fl. Ludov. 81. 1817? 

 Discopleura Nuttallii DC. Mem. Omb. 38. 1829. 



Discopleura capillacea var. Nuttallii Coult. & Rose, 

 Bot. Gaz. 12: 292. 1887. 



Ptilimnium Nuttallii Britton, Mem. Torn Club 5 : 244. 

 1894. 



Similar to the preceding species, but generally 

 stouter, 2-3 high, the branches nearly erect. 

 Umbels /-25-rayed; bracts of the involucre linear, 

 entire, short, those of the involucels minute ; fruit 

 nearly orbicular, obtusish, about i" long. 



In swamps, Illinois to Kansas, Louisiana and Texas. 

 May-Sept. 



49. CICUTA .L. Sp. PI. 255. 1753. 



Erect tall perennial glabrous herbs, with pinnate or pinnately compound leaves, and 

 compound terminal umbels of white flowers. Involucre of few bracts, or none ; involucels 

 many-bracted. Calyx-teeth acute. Petals broad, the apex inflexed. Stylopodium short- 

 conic ; fruit ovoid, or oblong, glabrous, slightly flattened laterally. Ribs corky, the lateral 

 ones rather the strongest ; oil-tubes solitary in the intervals, 2 on the commissural side. Seed 

 nearly terete. [The ancient Latin name.] 



About 8 species, natives of the north temperate zone and Mexico. Besides the following about 

 4 others occur in western North America. Type species : Cicuta virosa L. 



Leaf-segments lanceolate. 

 Leaf-segments narrowly linear. 



1. C.maculata. 



2. C. bulbifera. 



42 



