Family ASTERACEAs 197 
1. Carduus lanceolatus L. Common or Bull Thistle. 
Introduced in the southeastern part of the state. Nebraska City; 
Weeping Water. 
2. Carduus altissimus L. Tall Thistle. 
Common in woods and along roadsides in the eastern part of the 
state. Ainsworth; Dismal River; Holt county; Lincoln; Nebraska 
City; Newark; Peru; Valentine. 
3. Carduus flodmanii Rydb. 
In river bottoms and meadows. Arcadia; Minden; Newark; Antelope 
county. 
4. Carduus discolor (Muhl.) Nutt. Field Thistle. 
Common over most of the state. Gordon; Grand Island; Red Cloud; 
Scotts Bluff; Weeping Water. 
5. Carduus undulatus Nutt. White Thistle. 
On plains and prairies throughout the state. Ainsworth; Boelus; 
Deuel county; Niobrara; Red Cloud; St. Paul; Squaw canyon; Utica. 
6. Carduus plattensis Rydb. 
In the sand-hills. Box Butte county; Glen; Kennedy; Minden; 
O’Neill; Paddock; Thedford; Valentine. 
7. Carduus ochrocentrus (A. Gray) Greene. 
Callaway; Indianola; Long Pine; Minden; Riverton. 
8. Carduus nebraskensis Britton. 
In the western part of the state. Scotts Bluff. 
9. Carduus arvensis (L.) Robs. Canada Thistle. 
Introduced in the eastern part of the state. Arlington; Lincoln; 
Nebraska City; Omaha; Plainview; St. Paul. Forms with soft 
bristles were reported from Bethany and College View. 
3. Centaurea. 1034. 
Bracts fimbriate, not ending in stiff spines. 
Leaves entire. 1. C. cyanus. 
Leaves pinnatifid. 2. C. maculosa. 
Bracts ending in stiff spines. 3. C. solstitialis. 
1. Centaurea cyanus L. Blue-bottle. 
Cultivated and sometimes escapes. 
2. Centaurea maculosa Lam. 
Introduced and spreading along roadsides near Brunswick and east 
of Plainview. 
3. Centaurea solstitialis L. Star Thistle. 
Introduced, but rare. Crete; Davey. 
Tribe 11. CICHORIE. 
Pappus of small scales, much shorter than the achenes; flowers blue 
or white 1. Cichorium. 
Pappus of bristles at least as long as the body of the achene. 
Stems leafy or with several flowers. 
Heads 5-10-flowered, flowers pink or purple. 
Lower leaves runcinate pinnatifid; pappus plumose. 2. Ptiloria. 
All the leaves entire, the upper often reduced to scales; 
pappus simple. 8. Lygodesmia. 
