TRIFOLIUM HAYDENII Porter in Hayden's Surv. 1871: 480. 1871.
This was referred to T Itingis by Watson, but has nothing to do with it. It is rather common in certain localities of central and southwestern Montana. Flodman, no. 623, from the Bridger Mountains, and no. 624, from the Spanish Peaks ; Frank Tweedy, Park Co., Montana, 1887, and in the Yellowstone Nat. Park, 1884. Also collected by the author and T. A. Williams in the Spanish Basin.