CREPIS RUNCINATA ALPICOLA.
Stem scapose, about I dm. high, generally only I-flowered ; leaves entire, or with a few small teeth, and with very short pet ioles.
In habit it is very unlike the typical C. runcinatce, but I have been unable to find any essential characters in the heads, involu cre, pappus or achenes, by which to separate it as a species. The short 1-flowered stem, smaller and more entire leaves may be due to the high altitude, 7000 feet, at which it grew.
Type : Flodman, no 931, August 24, 1896, from Yogo Baldy, Little Belt Mountains.
Antennaria dioica and its North American Allies, In 1892 when I began to determine my Black Hills collection, I felt that there must be something wrong in the genus Antennar, especially in the group of which A. dioica is the representative species. My studies then, my field work in 1895 and 1896, and Mr. Flodman's collection have made it possible I think to remove at least a part of the difficulty. What have been named in our her baria A. dioica and A. alma constitute not less than six distinct species. I suspected that A. plantaginifoka contains more than one species, but have not been able to satisfactorily solve the problem. This seems to have been done by Prof. E. L. Greene in a recent number of " Pittonia"; I shall, however, add a description of the prairie plant of Nebraska, Kansas and Dakota, referred to in Prof. Greene's paper. As far as I know the species at present, I shall ar range them as follows: Heads sessile at the ends of short leafy branches resembling the stolons.
A. ros11 la ta.
Heads in cymose or subcapitate clusters, or solitary on evident erect stems.
Basal leaves and those of the stolons narrowly oblanceolate ; bracts generally rose-color. A. parvifolia.
Basal leaves and those of the stolons spatulate or obovate.
Basal leaves .5-4 cm. long and less than 1.5 cm. wide, one-ribbed or indis tinctly three-ribbed.
Heads 5-7 mm. high.
Plants less than 1.5 dm. high ; heads in subcapitate clusters.
Bracts of the pistillate plant dark greenish brown, acute or acuminate. A. alpina.
Bracts of the pistillate plant umber, obtuse.
A. umbrinella.
Plants generally over 2 dm. high ; heads in an open cyme. Basal leaves cm. long ; stem leaves linear.
A. microphylla.
Basal leaves 2-3 cm. long ; stem leaves spatulate, broadly ob long and ovate-lanceolate. A. pedicellata. Heads about r cm. high.
Basal leaves broadly spatulate, with a distinct petiole, generally tomentose on both sides; bracts of pistillate plant obtuse, or the innermost seldom acute. A. dioica.
Basal leaves more glabrate above, without distinct petiole; bracts of pistillate plant acute or acuminate, or the outermost ob tuse.
Stem slender, 2-3 dm. high; stolons very long; basal leaves narrowly cuneate. A. neglecta.
Stem stout, short, about I din. high ; stolons short; basal leaves obovate. A. campestris.
Basal leaves over 4 cm. long and 1.5 cm. wide, prominently 3 ribbed.
Heads cymose; bracts of pistillate plant lanceolate.
Basal leaves broadly cuneate without distinct petiole.
A.
Basal leaves oval with a distinct petiole. A. liantatinifidia.
Head solitary; bracts of pistillate plant almost linear.
A. solitaria.
Heads racemose or paniculate. A. racemosa.