340 UNIVERSITY OF MISSOURI STUDIES [S^Z 



425. OENTAUREA L. Star-thistle. 



1036. O. Jacea L. Brown knapweed. 

 Old meadows; infrequent. 

 Europe, thence to North America. 



1037. O. solstitialis L. Star -thistle. 



Weed in an alfalfa field in the flats of Grindstone creek. 

 Europe, thence to California and Missouri. 



1038. O, Cyanus L. Blue-bottle. Cornflower. 

 Roadsides; infrequent. 



Europe, thence to North America. 



426. CIOHORIUM L. Succory. 



1039. O. Intybus L. Chicory. 

 Roadsides and fields; local. 



Europe and Asia, thence to North America. 



427. KRIGIA Schreber lADOPOGON Neck.]. 

 Dwarf dandelion. 



1040. K. amplexicaulis Nutt. [^A. Virginiais {!..) Kuntze]. 

 Virginia goatsbeard. 



Frequent in thickets and open oak woods. 

 Massachusetts to Ontario and Manitoba; Georgia to 

 Kansas. 



428. TRAGOPOGON L. Salsify. Goatsbeard. 



1041. T. porrifolius L. Oyster plant. 

 Waste places; uncommon. 



Europe, thence to North America and Australia. 



429. TARAXACUM L. Dandelion. 



1042. T. officinale Weber \T. Taraxaaitn (L.) Karst.]. 

 Common dandelion. 



Very common in yards and fields. 

 Europe and Asia, now cosmopolitan. 



