194 CAMPANULALES 



Some of the heads on stout spreading peduncles 2-10 cm. long. 



1a. C. intybus divaricatum. 



1. Cichorium intybus L. Chicory. 



Frequently found in alfalfa fields. Kennedy; Lincoln; O'Neill. 

 1a. Cichorium intybus var. divaricatum DC. 

 Brunswick; Lincoln. 



2. Ptiloria. (Stephanomeria.) 894. 



Pappus plumose to the base, white. 1. P. ramosa. 



Pappus merely scabrous at the base, brown. 2. P. pauciflora. 



1. Ptiloria ramosa Rydb. 



In dry soil in the western part of the state. Scotts Bluff; Sioux 

 County. 



2. Ptiloria pauciflora (Torr.) Raf. 

 Nebraska. 



3. Tragopogon. 894. 



Flowers yellow. 1. T. pratensis. 



Flowers blue. 2. T. porrifolius. 



1. Tragopogon pratensis L. Yellow Goat's-beard. 



In waste places in various places in the state. Blue Hill; Grand 

 Island; Minden; Ord; Plainview. 



2. Tragopogon porrifolius L. Oyster Plant; Salsify. 

 In wet places. Blue Hill; Lincoln; Minden. 



4. Malacothrix. 895. 



1. Malacothrix sonchoides (Nutt.) T. & G. 

 Nebraska according to Britton's Manual. 



5. Taraxicum. 896. 



Outer bracts reflexed, not glaucous, heads 3-5 cm. broad, achenes 

 brownish green. 1. T. taraxicum. 



Bracts spreading or ascending, glaucous, heads not over 2.5 cm. 

 broad, achenes red. 2. T. erythrospermum. 



1. Taraxicum taraxicum (L.) Karst. Common Dandelion. 

 A common weed all over the state, especially in lawns. Crete; Lin- 

 coln; Minden; Red Cloud; Wahoo. 



2. Taraxicum erythrospermum Andrz. Red-seeded Dandelion. 

 More recently introduced, but common in many places. Hastings; 

 Lincoln; Minden; Plainview; Red Cloud. 



6. Sonchus. 896. 



Leaves with acute auricles; achenes transversely wrinkled. 



S. oleraceus. 

 Leaves with rounded auricles; achenes not transversely wrinkled. 



1. S. asper. 



