.182 UMBELLIFER.E. (PARSLEY FAMILY.) 



21. POLYT^NTA, DC. 



Calyx 5-tootlied. Fruit oval, compressed, the margins thickened ; carpels 

 obscurely ribbed, with two vitta; in the intervals, ami six on the commissure. 

 A smooth biennial 1 herb, with pinuately divided leaves, and yellow flowers. 



1. P. Nuttallii, DC. Stem erect from a thick tap-root, l-3 high; 

 leaves '2- 3-piunate, with coarse toothed lobes, the upper opposite, 3-parted ; 

 involucre none; involucels bristly. -Alabama, Tennessee, and westward- 

 April. 



22. TREPOCARPUS, Nutt. 



Calyx teeth subulate, deciduous. Fruit linear oblong, acute, nearly terete, 

 8-angled ; carpels 4 ribbed, each rib covering a single vitta. Commissure 

 spongy, grooved in the middle, with two minute vittoe next the seed. A 

 smooth annual, with 3-piunately finely dissected leaves, and 3-5-rayed long- 

 peduncled umbels. 



1. T. JEtlmsa, Nutt. Low banks near Mobile (Mohr). Stem 2 high. 

 Peduncles longer than the leaves. Flowers white. 



23. DAUCUS, Touru. CARROT. 



Calyx 5-toothed. Corolla irregular. Fruit ovate or oblong. Carpels with 

 3 primary inconspicuous ribs, ciliate on the back, and one at each margin 

 within, and 4 secondary wings divided into barbed prickles, with a single 

 vitta under each, and 2 on the inner face. Annual or biennial herbs, with 

 2- 3 pinuately finely divided leaves, many-leaved involucres and involucels, 

 and white or yellowish flowers. Fruiting umbels concave at the top. 



1. D. Carota, L. Stem 2 -4 high, hirsute; fruit oblong; wings of 

 the carpels divided to the base into 12 or more bristly prickles. Waste 

 places. Introduced. 



2. D. pusilla, Michx. Stem |-2 high, bristly; fruit oblong-ovate ; 

 wings of the carpels deeply parted into 6 -8 flattened prickles; umbel 1'- 2' 

 wide. Sandy old fields. May - June. 



24. CH^3ROPHYLLUM, L. 



Calyx teeth obsolete. Fruit oblong or linear, tapering at the apex, con- 

 tracted at the sides. Carpels deeply furrowed on the commissure, with 5 

 obtuse equal ribs. Intervals with single vittae. Herbs, with compound 

 finely dissected leaves, and white flowers. Involucre few-leaved or none. In- 

 volncel many-leaved. 



1. C. procumbens, Lam. Stem weak, slightly pubescent ; leaves ter- 

 nately divided; the divisions bipinnatifid, with oblong obtuse lobes; umbel 

 sessile, of 2-3 long rays; involucel 4 - 5-leaved, few-flowered ; fruit oblong, 

 abruptly pointed, finely ribbed. Shady river banks. April- May. (T) or 

 Stems f>'- 18' long. 



2. C. Teinturieri, FTook. & Am. More pubescent ; lobes of the leaves 

 narrower and acute ; fruit oblong-linear, more strongly ribbed and tapering 

 at the apex; otherwise like the last. Banks of the Apalachicola River,. 

 Florida, and westward. March -April. Stem erect, 1 high. 



