[Vol. 2 



602 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



Germ. & Helv. 16: 38. pi. 75 (CMLXVI). fig. 1. 1854; Cosson & 

 Saint-Pierre, Fl. Paris, ed. 10, 518. 1861. Beck von Man- 

 nagetta, Fl. Nieder-Oesterr. 1221. 1893. 



An herbaceous biennial or perennial, more or less floccose- 

 tomentulose throughout and on the stem and lower leaf- 

 surface often intermixed with hirsute hairs ; stems erect, 3 to 

 10 dm. high, simple or branched; leaves lyrately pinnatifid 

 to pinnatisect, 2 to 10 cm. long, 1 to 6 cm. broad, the lobes 

 subentire, blunt, and submucronate to sharply dentate ; lower- 

 most leaves narrowed into a subpetiolate base, the upper ses- 

 sile and semiamplexicaul ; inflorescence a terminal few- to 

 many-headed corymbose cyme; heads about 1 cm. high, 

 radiate; involucre campanulate, calyculate; bracts of the in- 

 volucre usually 13, lanceolate-oblong, 4 to 5 mm. long, 

 glabrous or slightly floccose-tomentulose, with rather broad 

 scarious margins; ray-flowers about 13; disk-flowers numer- 

 ous, 50 to 60; achenes hirtellous. 



Distribution: on ballast near Philadelphia. Introduced 

 from Europe. 



Specimens examined: 



Pennsylvania: on ballast, Philadelphia, 30 Aug., 1879, 

 Parker (Gray Herb.). 

 New Jersey: on ballast, Kaighn's Point, Burk (Field Mus. 



Herb. ) . 



16. S. Jacobaea L. Sp. PI. 2 : 870. 1753 ; Willd. Sp. PI. 3 : 

 1997. 1800 ; DC. Prodr. 6 : 350. 1837 ; Sm. & Sow. Eng. Bot. 16 : 

 pi. 1130. 1803 ; Schkuhr, Handb. pi. 267. 1808 ; Beichb. Ic. FL 

 Germ. & Helv. 16 : 38. pi. 73 (CMLXIV). figs. II. 3, 4. 1854; 

 Gray, Syn. Fl. N. Am. I 2 : 383. 1884, and ed. 2, 1886 ; Britton, 

 Manual, ed. 2, 1029. 1905 ; Gray, Manual, ed. 7, 853. 1907 ; Brit- 

 ton & Brown, 111. FL, ed. 2, 3 : 542. 1913. 



Jacobaea vulgaris Vahl in Fl. Dan. 6 : pi. 944. 1787 ; Gaertn. 

 Fruct. 2 : 445. pi. 170. fig. 1. 1791. An erect, biennial or peren- 

 nial herb, 3 dm. or more high, at first usually arachnoid- 

 tomentulose, more or less glabrate; basal leaves petiolate, 

 somewhat lyrate ; stem leaves sessile, semiamplexicaul, ovate- 

 oblong in general outline, 3 to 15 cm. long, 1.5 to 7 cm. 



