1004 



COMPOSITAE 



Cichorium 



50 



Map 2202 



Onopordum Acanthium L. 



Jan. 



Feb. 



Mar. 



Apr. 



May 



June' 



July 



Aufc 



Sept. 



Oct. 



Nov. 



Dec. 



Miles 



o 5o 



Map 2203 



Cichorium Intybus L. 



50 

 Map 2204 



Serinia oppo&itifolia (RafJ Ktze. 



Tips of the involucral bracts much dilated. 



Bracts irregularly denticulate or lacerate for half their length or more. (See 



excluded species no. 692, p. 1104) C. Jacea. 



Bracts pectinate or ciliate at the summit only. (See excluded species no. 696, 



p. 1105) C. vochinensis. 



9553. CICHORIUM[[Tourn] L. 



1. Cichorium Intybus L. Chicory. Map 2203. This species is now 

 found throughout the state and in many parts has become an obnoxious 

 weed. When once established, I have found from personal experience that 

 it is very difficult to eradicate. Our first reports for it say: "an escape 

 from gardens." In recent years it doubtless has been introduced in grass 

 and other seeds. The dried roots are used as a substitute for coffee, and 

 it has been cultivated for that purpose. My bitter experience with it 

 compels me to advise against its use in the flower garden and to exterminate 

 it wherever it is found. All of my specimens are from hard, dry clay or 

 dry, sandy soils. Plants with white flowers, forma alba Farwell, are some- 

 times found. In a colony extending for nearly a half-mile in hard, clay 

 soil along an unimproved road in Allen County I estimated that 40 per 

 cent of the plants were white-flowered. 



Nat. of Eu. ; N. S. to Wash., southw. to Fla., Tex., and Calif. 



9556. SERfNIA Raf. 



1. Serinia oppositifolia (Raf.) Ktze. Map 2204. This species was found 

 in flower on May 12, 1935, by Scott McCoy. It was growing in wet soil on 

 the border of a woods along State Road 62 a few miles east of Boonville, 

 Warrick County. 



Va., 111., Mo. to Kans., southw. to Fla. and Tex. 



9560. KRfGIA Schreb. 



Plants stemless or nearly so; flowers on scapes. 



Plants bearing tubers; tubers usually one to a plant, globose, about 1 cm in diameter; 

 basal leaves mostly 4-20 cm long; involucres 10-14 mm long; pappus of 10-15 

 narrow, oblong, white scales and 15-20 longer bristles 1. K. Dandelion. 



