251 
Calfornia: W. H. Brewer, no. 1714, 1863; Kellogg & Har- 
ford, no. 211, 1868-9. 
Washington: W.H. Suksdorf, 1885. 
Yellowstone National Park: T. H. Burglehaus, 1893. 
Rocky Mountains of British America: Dawson, nos. 7471, 
7870, 18734, 1430, 1881; J. Macoun, no. 10474, 1895. 
SPIRAEA DENSIFLORA N utt.; T. & G. Fl. N. Am. 1: 414. 1840. Under 
S. detulacfolia. 
S. chamaedrifolia @ Hook. & Arn. Bot. Beechy,123. 1841. 
S. betulacfolia rosea in herb., not Gray. 
This seems to be well distinct from S. lucida, which is common 
in the same region. The latter grows mostly in open places, 
while 5S. densiffora is found only in the deeper woods. Bridger 
Mountains, Flodman, no. 543, and Little Belt Mountains, no. 
544. The following specimens also are in the Columbia Her- 
barium: Nuttall (type) Rocky Mountains of Columbia; Beechey’s 
Voyage, Kotzebue’s Sound; J. M. Macoun, British Columbia, 
1890. 
’ HEDYSARUM SULPHURESCENS. 
HZ, flavescens Coulter & Fisher, Bot. Gaz. 18: 300. 1893. Not 
Regel & Schmalh. 
This was collected by J. H. Flodman in 1896 in the Spanish 
Basin, no. 650, and in the Bridger Mountains, no. 651, and by 
the author in 1895 near Bozeman, no. 2720. 
Trirotium Haypenu Porter in Hayden’s Surv. 1871: 480. 1871. 
This was referred to 7: Kingii 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. : 
* VACCINIUM MICROPHYLLUM (Hook.) 
V. Myrtillus var. microphyllum Hook. Fl. Bor. Am. 2: 33: 
I 834. / 
In my opinion this is just as good a species as any, differing from 
