ANTENNARIA MICROPHYLLA.
Stem slender, strict, 2-3 dm. high ; pubescence very fine; leaves of the stolons small, .5-1 cm. long, spatulate ; stem-leaves linear oblong ; heads small, mm. high, in a rather open corymb ; bracts of the pistillate heads tinged with greenish yellow, linear oblong or lanceolate, mostly acute, those of the staminate head with oval-oblong white scarious margins.
In the characters of the head and bracts, it is intermediate be tween A. and A. plantaginifolia. The head is scarcely as large as that of the former, the stem is much more slender than in either and the leaves smaller than in any of the group. It has
been variously labelled in collections as A. dioica, A. luculoides, A. Carpatica, etc. The following specimens are in the Columbia herbarium : Montana: P. A. Rydberg, no. 2831, 1895, from Manhattan (type); J. H. Flodman, no. 864, 1896, from Bozeman.
Yellowstone National Park : Frank Tweedy, no. 203, 1884 ; A. Brown, 1893.
Wyoming : Fremont ; A. Nelson, no. 762.
Colorado: C. C. Parry, 1872 ; Letterman, no. zoo, 1884. Utah: S. Watson, no. 651, 1869.
Saskatchewan: E. Bourgeau, 1858.