136 Wyoming Experiment Station. 



Dysodia chrysanthemoides, Lag. Nov. Gen. et Sp. 29 (1816). D. 

 papposa, (Vent.) A. S. Hitchc. 



Common in the eastern part of the state. 



From Wheatland, by B. C. Buffum, August 11,1891; Platte 

 River, July 14, 1894 (No. 499). 



Helenium autumnale, L. Sp. PI. 886 (1753). 

 Very frequent on river bottoms. 



Popo Agie River, August 1, 1894 (No. 736); lone Ranch, August 

 10, 1895 (No. 1664). 

 Helenium Hoopesii, Gray, Proc. Acad. Phil. 65 (1863). 

 Infrequent; Union Pass, August 11, 1894 (No. 841). 

 Gaillardia aristata, Pursh, Fl. ii, 573. 



Frequent and quite variable especially as to foliage. Probably 

 throughout the state. 



Platte River Hills, July 11, 1894 (No. 417); Pole Creek, June 27, 

 1895 (No. 1326). 



Actinella acaulis, Nutt, Gen. ii, 173. 



Very frequent indeed in various forms, the earlier individuals 

 scapeless as well as stemless. 



Laramie Hills, June 7, 1894 (No. 177); Table Mountain, June 

 27, 1895 (No. 1300). 



Actinella glabra, (Nutt.) n. sp. 



If ever a plant deserved specific rank, this one does. Many as 

 are the forms of A. acaulis, by necessity, there is no excuse for 

 making this one of them. It is clearly separated from that by the 

 much longer branches of the caudex, which are closely covered 

 with the persistent bases of dead petioles, all of which are com- 

 pletely enveloped in long, densely matted wool, brownish-red, 

 except at the summit, where it becomes continuous with the white 

 persistent wool of the scape and involucre. Leaves longer, glab- 

 rous and strongly impressed-punctate ; heads large, 1 inch or even 

 more across. Roots enormous, sometimes several feet in length ; 

 the multicipital caudex forming raised rounded tufts 6-12 inches 

 across, which very early in the spring become covered with fine 

 yellow heads. A. acaulis glabra. Gray. A. glabra, Nutt. 



Exceedingly abundant in the Laramie Hills, where it is in blos- 

 som from April to June (Nos. 36 and 1233). 



