1918] 
PAYSON—NOTES ON CERTAIN CRUCIFERAE 145 
,Ft. Steele, June 18, 1898, A. Nelson 4834 (Rky. Mt. Herb.) ; 
Green River, July 9, 1897, Williams (Rky. Mt. Herb.) ; Bates 
Creek, July 5, 1901, Goodding (Rky. Mt. Herb.). 
Colorado: dry hills, Naturita, April 22, 1914, Payson 247 
(Mo. Bot. Gard. Herb. and Rky. Mt. Herb.) ; foothills near 
Mancos, June 23, 1898, Baker, Earle Ф Tracy 75 (Mo. Bot. 
Gard. Herb. and Rky. Mt. Herb.) ; Mack, May 27, 1908, Jones 
(Mo. Bot. Gard. Herb.) ; gravel washes, Placerville, July 23, 
1917, Payson 1093 (Mo. Bot. Gard. Herb. and Rky. Mt. Herb.), 
TYPE; dry, rocky slopes, Paradox, June 13, 1912, Walker 89 
(Rky. Mt. Herb.) ; Mesa Verde National Park, 1913, Haas 40 
(Rky. Mt. Herb.) ; hills near Montrose, May 3, 1913, Payson 
75 (Rky. Mt. Herb.). 
New Mexico: Aztec, April, 1899, Baker 356 (Rky. Mt. 
Herb.). 
Utah: gravel, Cedar City, May 8, 1894, Jones 5202 (Mo. 
Bot. Gard. Herb.); near Fish Lake, May 17, 1875, Ward 48 
(Mo. Bot. Gard. Herb.) ; east slope, Steptoe Valley, May 13, 
1859, H. Engelmann (Mo. Bot. Gard. Herb.); Echo, May 7, 
1890, Jones (Mo. Bot. Gard. Herb.) ; Mt. Nebo, Aug. 15, 1905, 
Rydberg & Carlton 7740 (Rky. Mt. Herb.); shale slopes, 
Brush Creek Canyon, Uintah Mts., July 17, 1902, Goodding 
1279 (Rky. Mt. Herb.). 
1b. Var. lanata A. Nels. Bull. Torr. Bot. Club 31: 241. 
1904. 
P. lanata Rydb. Bull. Torr. Bot. Club 39 : 322. 1912. 
Distribution: northern Wyoming and Montana. 
2. P. vitulifera Rydb. Bull. Torr. Bot. Club 28 : 278. 1901. 
P. didymocarpa Gray, Am. Jour. Sci. & Arts II. 33:243. 
1862. 
Distribution: in the mountains of Colorado. 
3. P. brassicoides Rydb. Bull. Torr. Bot. Club 29:937. 
1902. 
Distribution: western Nebraska to southwestern North 
Dakota. 
4, P.acutifolia Rydb. Bull. Torr. Bot. Club 28 : 279. 1901. 
Distribution: in the mountains of Colorado. 
