698 PROCEEDINGS OF THE XATIOXAL MUSEUM. vol.xxth. 



not seen the tj'^pes of anj' of Dv. Rydberg's species, I have examined 

 duplicates of all of them. This preliminary revision is based princi- y 

 pally on the material in the United States National HerV)arium and in '' 

 my private collection of Antennarias. I am under great obligation to 

 Dr. E. L. Greene for the privilege of examining types and typical ij 

 specimens of the species which he has described; and through the \ 

 kindness of Mr. J. M. Macoiui it has been possible for me to study ^ 

 the types and other material preserved in the herbarium of the Geo- 

 logical Survey of Canada. I owe much to Mr. Frederick V. Coville 

 and Dr. J. N. Rose, who have in man}' ways greatly aided me in the 

 study of this genus and in the preparation of this paper. 



The results of m}' investigation are incorporated in the following 

 presentation of the species: 



SYNOPSIS OF THE SPECIES OF ANTENNAKIA, ALLIED TO A. ALPINA 

 AND A. DIOICA, OCCURRING IN NORTHERN AND WESTERN NORTH 

 AMERICA. 



a. Lean's roynpurativi'hi Kiindl. {an on pagt' 713.) 



I). Tij»: (if inntliicrnl bracts green. ti> pale hroirii. Segregates of A. alpina uf the Syn- 

 optical Flora. {A. artda may be looiied for here.) {bb on page 704.) 

 c. Ileach soUtarij or 1 — 3. {cc on page 699.) 



1. Antennaria monocephala DC. Prodr. 6:2tji*. lc^-±6. 



Slender, i»-ll cm. high, the stolons about 1 cm. long; leaves nar- 

 rowly oblanceolate, acute, and cuspidate-mucronate, 10-15 mm. long, 

 green and glabrate above: stem lioccose-wooll}", with leaves less than 

 1 cm. long; involucres 5.5 mm. high, the bracts (of pistillate heads) 

 comparatively broad (1 mm. or less), obtuse, brown but lighter in color 

 toward the ver}^ tips. 



Type locality. — "In insula Unalaschka''. Type either in the De 

 Candollean or the Berlin Herbarium. 



Known to me only from the island of Unalaska and from near Nome 

 City, Alaska (Flett, no. 1655, Anvil Mountain, 1900). 



The above description is drawn from the specimen in the herbarium 

 of the Geological Survey of Canada, collected by J. M. Macoun on 

 "mountain summits," Unalaska, Bering Sea, August 22, 1891. The 

 Alaskan specimens collected l)y J. B. Flett, examined by me, are 

 all male plants. The tips of the bracts are oblong and obtuse and 

 greenish brown, while the pappus bristles are like those of ^4. t-.rvV/.y. 



2. Antennaria exilis Greene, Pittonia 3 : 288. 1898. 



Low, slender, 2-8 cm. high, the stolons short; leaves spatulate, 

 acute, 7-12 mm. long, lightl}' woolly on both surfaces, heads solitary; 

 involucres about 1.5 mm. high, the pistillate bracts acute or acuminate, 

 the staminate obtuse or acutish. 



Tf/jjc locality. — "St. Paul Island, Bering Sea." Collected ])y J. M. 

 Macoun and by Kincaid; type in the herbarium of E. L. Greene. 



