Rydberg : Rocky Mountain flora 323 



at all agree with a duplicate of the type of A. pulcherrima in the 

 Torrey herbarium. In the latter, the bracts are imbricated in 

 6 or y series, wholly brown, the innermost very narrow and 

 acuminate. A. foliacea Greene is wholly ignored, although E. 

 Nelson had it in his paper. A. Sierrae- Blancae Rydb. is made a 

 synonym of A. rosulata, although the words "leaves glabrate 

 above" are added after the reference. Probably the authors had 

 not seen any specimens. The characters of the bracts (not referred 

 to) are a better distinction than the mere lack of tomentum. On 

 the other hand, Antennaria ohlanceolata Rydb. is kept distinct from 

 the closely veXdited A. luzuloides. In the key the latter is placed 

 under the heading "bracts tomentose except the scarious tips"; 

 but in the description is stated "involucres glabrous nearly or 

 quite to the base." The latter characterization is correct and 

 A. luzuloides should be associated with A. ohlanceolata instead of 

 A. pulcherrima in the key. 



Antennaria acuta sp. nov. 



A surculose-stoloniferous perennial; stems slender, 5-12 cm. 

 high; stolons short and mostly ascending; basal leaves and those 

 of the stolons narrowly oblanceolate, greenish-white, tomentose 

 on both sides, glabrate in age, 15-25 mm. long, 2-4 mm. wide, 

 acute or abruptly short-acuminate; tomentum very fine and ap- 

 pressed; stem-leaves narrowly linear or linear-oblanceolate; heads 

 3-5, conglomerate, sessile; involucres about 6 mm. high, tomen- 

 tose below; bracts of the pistillate heads lanceolate to linear- 

 lanceolate, dark greenish brown with slightly lighter tips, the 

 inner acute. 



This is related to Antennaria alpina and A . media. It resembles 

 perhaps most the former but the leaves are equally tomentose on 

 both sides. From A. media it differs in the narrower, acute or 

 acuminate leaves with a finer, closely appressed tomentum. 



Alberta: Marsh near Lake O'Hara, Aug. 8, 1904, /. Macoun 

 65423 (type in herb. N. Y. Bot. Gard., duplicate in herb. Geol. 

 Surv. Canada); also Bow River at Laggan, July 25, 1904, 65413; 

 and Pipestone Creek, July 6, 1904, 65422. 



Gnaphalium 

 In Coulter & Nelson's New Manual both Gnaphalium sulphur es- 

 cens Rydb. and G. thermale E. Nels. are cited as synonyms of 



