Rydberg : Rocky Mountain flora 321 



have seen and \vhich I think belong here are Goodding 430, from 

 Ten Sleep Lakes, Big Horn County, Wyoming, and labeled A. 

 nardina. 



The pistillate plants of the four species are easier to distinguish. 

 Antennaria mucronata has very dark greenish brown bracts, as 

 dark as those of A. media but the inner bracts are oval, obtuse or 

 even rounded at the apex, and inclined to be white-tipped. The 

 leaves of the rosettes are narrower and with more appressed 

 pubescence. The bracts of the pistillate head of A. unibrinella 

 have about the same shape as those of A. mucronata but are 

 from light umber-brown to almost yellowish, and of the same color 

 throughout. The leaves are much shorter and broader, like those 

 of A. media, but with appressed tomentum. The bracts of the 

 pistillate heads of A. flavescens are still lighter than those of A. 

 umhrinella, being yellowish or brownish white, oblong and scarcely 

 more than half as broad, but still obtuse. The leaves are 

 yellowish. It would have been better to have designated Rydberg 

 & Bessey 5146 instead of 5145 as the type, because the former 

 number contains pistillate as well as staminate plants. The pis- 

 tillate heads of A. reflexa have bracts of a color similar to that of 

 A. umhrinella but they are decidedly acute and resemble those of 

 A. media in shape. 



The staminate plants of this group are very rare, except in 

 Antennaria flavescens , in which it is the common form, the pistillate 

 plant being comparatively rare. In the herbarium of the New 

 York Botanical Garden the staminate plants are represented by 

 the following specimens: 



Antennaria alpina (L.) Gaertner: /. Kdllstrom (Tronfjeld, Nor- 

 way). 

 A. monocephala DC. : Wm. Home (Karluk, Alaska), Blaisdell (Cape 



Nome, Alaska). 

 A. media Greene: Hall cf Chandler 686 (Mt. Goddard, Calif.); 

 Sonne 160 in 1888 (Bear Creek, Placer Co., Calif.) and in 1892 

 (Coldstream, Calif.). 

 A. mucronata, E. Nels. : L. Goodding 430 (Ten Sleep Lakes, Wyo,). 

 A. timbrinella Rydh.: FlodmanSjQ (partly) (Long Baldy, Mont.); 

 Macoun 6gj3g (Meyer's Creek, B. C); Umbach 615 (Midvale, 

 Mont.); Rydberg df Bessey 3164 (Mt. Chauvet, Idaho); Shear 

 & Bessey 3 gy I (Steamboat Springs, Colo.). 



