XJMBELLACEAE (CARROT FAMILY) 167 



HH. Plants of mountains and plains, glabrous or merely pubescent; wings of 

 the carpels thin. 



I. Leaves pinnate; leaf segments wide, crowded, more or less confluent ; 

 flowers purple or pinkish. E. — (Gk. phellos = cork, pteron = wing; re- 

 ferring to the fruit-wings.) Phellopterus purpurascens 



II. Leaves temate and then pinnate; leaf segments linear, not crowded, more 

 or less hard-tipped; flowers yellow or white. — (Gk. pteryx = a bird's wing; 

 referring to the wide fruit-wings.) Pterysda 



GG. Ribs of the carpels not winged. 

 J. Stem leaves simple, entire, clasping or perfoliate. E. — (Gk. bous = an 

 ox, pleuron = a rib; referring to the conspicuous leaf veins of some species.) 



Bupleurum americanum (THOROUGHWAX) 

 JJ. Stem leaves none or not as above. 



K. jFlowers yellow; carpel rib all filiform; plant without leafy stem. C. — 

 (Gk. hespera = evening or western, gennao = to beget; a western genus.) 



Hesperogenia Strickland! 



KK. Flowers white or greenish; at least the lateral carpel ribs corky. 



L. Stem 3 dm. or less high; lateral carpel ribs thick and corky, the dorsal 



fiUform. — (Gk. oros = a mountain, gennao = to beget; they are mountaia 



plants.) Orogenia 



LL. Stem s dm. or more high; all the carpel ribs corky and equally prominent. 



M. Calyx teeth minute; fruit flattened laterally; leaves pinnate. W. E. — 



(Gk. sion = the name of some marsh plant.) 



Sium cicutaefolium (water parsnip) 



MM. Calyx teeth none; fruit not or hardly flattened either way; leaves 



2-3-terminate. W. — (Gk. koUos = hollow, pleuron = a rib; from the 



hollow fruit ribs.) Coelopleurum 



CARUM (Caraway) 



Glabrous, erect. Leaves pinnate; leaflets few. Flowers white; in- 

 volucre and involucels present. Fruit flattened laterally, oblong to orbicular, 

 glabrous ; ribs filiform or inconspicuous ; oil tubes large, i in each interval, 

 2-6 on the commissure side. — (From Caria, a country in Asia Minor, where 

 , first found.) 



A. Even the upper leaves twice pinnate; fruit oblong, 4-5 mm. long. W. — Culti- 

 vated for the seed, as a spice. C. carui (garden caraway) 

 AA. At least the upper few leaves only once pinnate. 

 B. Fruit orbicular, 2 mm. long. W. C. E. C. gairdneri 

 BB. Fruit oblong, 3-4 ram. long. 

 C. Fruit rounded at both ends. C. E. C. oreganum 

 CC. Fruit narrowed at both ends, U. C. lemmon 



DAUCUS (Carrot) 



Annual or biennial. Flowers white; umbels compound. Calyx teeth 

 obsolete. Fruit oblong, somewhat flattened dorsally; primary ribs 5, 

 slender; secondary ribs 4, winged; oil tubes i in each interval, 2 on the 

 commissure side. — {Daukos was the Greek name for the Carrot.) 



