

534 COMPOSITAE (composite FAMIIjT) 



Tips of involucral bracts white. , 



Stems evident. 



Stems generally more than 1 dm. high (1-4 dm.); to- 



mentum fine, ailky , appressed. ■ ■ ' i , w ; n ! 1 1 



Leavesof the stolons narrowly oblanceolate, acute ., 7. .A. oorj^b^aa. ^ , ,j 

 Leaves of the stolons spatulate, obtuse or acute. . 8. A. parvifolia. 



Stems rarely more than 1 dm. high (3-15 cm.); h'oary-' ' "' ''/'''" 



tomentose. - . • ' ! ' ■ i ' > ! . n 



Leaves copduplioate for thp most part . ... 9. A. arida. ^ ,^ 

 Leaves not conduplicate . . ' . ' . 10. A. scariosa. | 



Stems wanting, the heads sessile in the rosulate leaves . 11. A. rosulata: ' i 

 Heads comparatively large, involucres 8 (7-9) mm..' high. ■; ■'. ■ 



Leaves permanently tomentose on both, surfaces. l. ■' i i i 



Pistillate bracts acute ... . . 12, ^. oxyphylla. 



Pistillate DractB generally obtuse 13. A. apnea. 



Leaves glabrous above or nearly so . . . , 14. A. marginata. 



Leaves comparatively large, 3-5 cm. long. 

 Leaves green and glabrate above. 



Leaves oblancbolate to linear . . . i i. . . 15. f A. oblanjcifpha.! 



Leaves broadly oval to oblong . ,.,,,. i . . , 16., A. raceniosa. ,,| 



Leaves tomentose above also . . ., - . .17. A. obovata. 



PLANTS NOT SURCULOSE-PROLIFEROUS 

 .Plants more than 1 dm. high; pappus-bristles of the staminate heads • i.rvn 



clayate. ■ . . ' , ■ . . i • ! . ., ' 



Plants tall (3-6 dm.); bracts tomentose except the scarious tipSf 



Leaves linear or narrowly oblanceolate ' . 18. A. luzidoides.i'" 



Leaves lanceola]be' or spatulate-lanceolate . .■ -. 19. A. pulcherrima. 



Plants lower (less than 3j dn^,); l^racts nearly glabwus , . . 20. A,., oblanoeo^at^. 



Plants less than 1 dm. high; pappus-bristles not clavate . 21. A. dimorph'a. 



1. Antennaria media Greene, Pitt. 3: 286, ,1898 ^ .. Rarely more tban£ rem. 

 high; stolons 1-3 cm. long: leaves spatulate-oblanceolate, often , narrowly 

 so, abruptly acute or acutish, 15 mm. or less long, wliite or, grayish-tpmentose 

 on both surfaces: involucres (jjistillate) about 4 mm. high; tips. of the, pis-ri . 

 tiilate bracts oblong to oblong-linear, obtuse, rarely acutish, green or greenish-, i 

 brown, rarely light brown and whitish at the very tips; tips of the, staminate,. \ 

 bracts oval, obtuse^ of same color as the pistillate ones. — From the mountains,!; 

 of California to British Columbia and in the Rocky Mountains from Colorado 

 to Alberta. . . , 



2. Antennaria fusca E. Nels. Bot. Gaz. 30: 120. 1900. About 1 dm. high: 

 leaves spatulate, obtuse and more or less truncate at apex, indistinctly mucro- 

 nate, about 2 cm. long, 5-7 mm. broad, canescently tomentulose or striate- 

 woolly on both surfaces: involucres 6-7 mm. high^ the tips.of the .brapts 

 (pistillate) oblong or oblong-linear, obtuse, greemsh-bro-a;n to buffrcolor:, , 

 staminate plant unknown. — ^In themountains; Wyoming. 



3. Antennaria reflexa E. Nels. Bot. Gaz. 27: 208. 1899. Slightly sufT , 

 frutescent, 5-15 cm. high: leaves spatulate or spa,tulate-obovate, obtuse, ,6-15 

 mm. long (usually 10 mm.), dull grayish-white, tomentose on both surfaces: 

 involucres 4-5 mm. high; the. bracts few, in less than 3 series; the tips of the 

 pistillate usually ifrom oval in the outer to oblong-Unear in. the inner, all obr 

 tuse, less frequently ovate or lanceolate in the outer to, Hnear in the inner, and, 

 acute or acuminate, greenish-brown to yellowish- white, rarely rose-color; the 

 tips of the staminate' oval, dbovate or oblong,' obtuse or truncate, usually of 

 firm texture, like the pistillate ones as to color. {A. flavesc&ns Rydb. Mem.' ■ 

 N. Y. Bot. Card. 1: 411. 1900.)— Colorado to Montana. ; , \ , ■ ' 



4. Antennaria umbrinella Rydb. Bull. Torr. Bot. Club 24: 302. 1897. 

 Stems 10-15 cm. high; stolons 4 cm. long or less: leaves narrowly spatiflate- 

 oblanceo}a,te, acute or ibrujptly acute and mucronate, 15-25 mm. long, 

 canescent on both surfaces, rarely tomentose: involucres 5-6 mm. high; tips 

 of the bracts (pistillate) oblong or oblong-lanceolate, obtuse, rarely acutisU) 

 greenish-brown, the very tips qften whitish: typical staminate plaitts Un- 

 known. {A . mucronata E. Nels. 1. c. 209.) — Colorado to Montana and Oregon. 



5. Antennaria rosea (Eat.) Greene, Pitt. 3: 281. 1898. Slender, 2-4 dm. 

 high; sterile basal branches ascending to erect, rarely prostrate; the canescent 

 tomentum of the leaves and the striate wool of the stems slightly viscid: 

 leaves very narrowly oblanceolate or elongated-Spatulate, acute, 15-20 ihm. 



