706 PROCEEDINGS OF THE NATIONAL MUSEUM. vo... xxiii. 



A very pretty species, with much larger heads than A. r<»«<t and 

 quite different involucres. 



18. Antennaria rosea (Eaton) Greene, Pittonia 3 : 281. 18i»8. 



A. parrifolhi Nutt. Trans. Am. Phil. 8oc. 7 : 406. 1841, in part (as to female plant). 

 A. dioica rosea Eaton, Bot. King Surv. 186. 1871, name only. 

 A. parvifolia rotiea Greene, Pittonia 3 : 175. 1897, name only. 



Slender, 2-4 dm. high; sterile basal hramhes ascending to erect, 

 rarely prostrate; the canescent tomentimi of the leaves and the stiiate 

 wool of the stems slightl}" viscid; leaves verj^ narrowly oblanceolate 

 or elongated spatulate, acute, 15-2») nun. long, less than 5 nun. wide; 

 heads in close and rounded or often rather open clusters; involucres 

 5-6 mm. high; bracts (pistillate) in a])<)ut three series, nearly equal or 

 somewhat imbricated, the tips oval to linear, usually all obtuse, rose 

 color to dull white. Male plant unknown. 



From Colorado to Alberta and westward to the Pacific coast. 



This is the most widely distributed as well as the most polymorphic 

 of ovir western species. It runs into numerous and perplexing forms. 

 It visually grows on dry ground, especialh' on partially Avooded slopes, 

 but is often found on the drier bottoms. This species and its variety 

 an(jni<tlfoUa'<ivi\ slightly viscid and oil}', as it were. This is especially 

 true of the dull and grayish indument of the radical leaves. Neither 

 in this species nor in its innnediate relatives do we lind an}' minute 

 glandular hairs such as often occur in A. parvifolia. 



Antennaria rosea angustifolia (Rydl).) comb. nov. 



A. augusllfuUa Rydb. Bull. Torr. C'lul) 26 : 546. 1899. 



A. sordida Greene, Pittonia 4 : 81. 1899,^ not 8ch. Bip. 1854. 



Lower and more subligneous than the species and more viscid; leaves 

 smaller, often ver}^ narrow; intlorescence more congested; heads as in 

 the species and with the same variation as to the color of the bract 

 tips. Male plant exceedingly rare. 



Typelocallty. — "Yosemite Valley," California. Collected 1)}' Torrey ; 

 type in the Torre}^ Herbarium. 



As compared with the species, this variety grows in dryer and more 

 exposed situations and at higher altitudes. It grades so imperceptibly 

 into A. rosea that its recognition as a species would not be justifiable. 

 In this variety, as often in the species, the leaves when stripped of 

 the indiunent usually present a granular and livid green surface. The 

 only male plants of the A. rosea group of which I have any knowledge 

 are those of Rydberg and Bessey's, no. 5159. These plants appear 

 to belong here rather than with the spcn-ies. The tips of the bracts 

 are obovate or oval, obtuse, and of a dull white color. 



The names A. an<justlfolla and ^i. sordida Greene were applied to 

 plants not material!}' different. As to leaves and habit they agree 

 very well. The first was based on an albino form of the Sierra 

 Nevada of California and the latter on a low tufted form of higher 

 elevations of the southern Rocky Mountains. 



^Type locality, "North Park, near Teller," Colorado. Collected by Sheldon, no. 

 128; type in the herbarium of E. L. Greene. 



