142 Wyojning Experiment Station. 



Senecio lugens, Richards. Bot. App. 748 (1823). 



Very common and of many forms which probably are worthy of 

 varietal distinction. The following numbers appear early on hill- 

 sides and valleys and are probably near the type: 



Table Mountain, June 2, 1894 (No. 128); Centennial Valley, 

 June 9, 189.") (No. 130.5). 

 Senecio lugens foliosus, Gray, Bot. Cal. i, 413. 



On hillsides, in rich loam soil among undershrubs. 



Union Pass, August 13, 1894 (No. 999); Centennial Valley, June 

 9. 1895 (No. 1246). 



Senecio lugens megalocephalus, n. var. 



Radical leaves large, irregularly and coarsely dentate ; cauline 

 leaves small or wanting ; stem branched from near the base into 

 several slender branches 8-12 inches long, each bearing a few (3-5) 

 large heads (5-8 lines high). The whole plant is very tardily 

 glabrate. In thickets on moist hillsides. 



Centennial Valley, June 9, 1895 (No. 1252). 



Senecio rapifolius, Nutt. 



Said to be a very rare plant. 



Sweetwater River, September, 1894 (No. 1180); Laramie Peak, 

 August 7, 1895 (No. 1589). 



Senecio serra, Hook. Fl. Bor. Am. i, 333 (1834). 



Infrequent; near Warm Spring Creek, August 10, 1894 (No. 771). 



Senecio serra integriusculus, Gray, Syn. Fl. 387 (1884). S. Andinus, 

 Nutt. 



A rare plant ; in the Union Pass hills, August 10, 1894 (No. 876). 



Senecio triangularis, Hook. Fl. Bor. Am. i, 332 (1834). 

 On wet banks in copses in mountain canons. 



Teton Mountains, August 21, 1894 (No. 936); Cummins, July 31, 

 1895 (No. 1519). 



Senecio wernersefolius, Gray, Proc. Am. Acad, xix, 54. 



Frequent in the "red hills " (Tertiary) about Laramie, June 15, 

 1894 (No. 224); Table Mountain, June 29, 1895 (No. 1379). 



Tetradymia canescens, D C. Prodr. vi, 440 (1837). 



On the dry plains of the Platte ; Big Muddy Creek, July 23, 

 1894 (No. 605). 



