Geni-s 45.] 



THISTLE FAMILY. 



401 



Appressed-wooUy: involucral bracts becotiiing dark brown. 5. G. uHginositm. 



Tufted low mountain herbs; heads few; bracts brown; pappus-bristles distinct. 6. G. supinum. 

 Slender, simple: heads spicate; pappus-bristles united at base. 



Leaves linear or lanceolate-spatulate, acute; heads about 3" high; northeastern. 



Bracts dark brown; stem leaves lanceolate-spatulate. 7. G. Norvegiciim. 



Bracts bro%vnisli tipped; stem leaves linear. 8. G. sylvaticum. 



Leaves spatulate, obtuse or oblusish; heads 2" to 2!2" liigb; eastern and southern. 



9. G. piirpurenni. 



I. Gnaphalium obtusifolium L. Sweet '*n,«^ ^' 



or White Balsam. Sweet or Fragrant 

 Life Everlasting. (Fig. 3851.) 



diaphalium obtusifolium L. Sp. PI. S51. 1753. 

 <7. polycephahim Mich.\. Fl, Bor. Am. 2: 127. 1S03. 



.Annual or winter-annual, fragrant; stem erect, 

 simple, or branched above, tomentose, i°-3° higli. 

 Leaves lanceolate or linear-lanceolate, sessile, 

 acute or acutish, or the lower obtuse at the apex, 

 narrowed at the base, densely white-woolly be- 

 neath, glabrate and commonly dark green above, 

 i'-3' long, 2"-4" wide, the margins undulate; 

 heads in numerous corymbose or paniculate clus- 

 ters of 1-5, about 3" high; bracts of the involucre 

 white, or tinged with brown, oblong, thin' and 

 scarious, obtuse, the outer woolly at the base; 

 pappus-bristles distinct, separately deciduous; 

 acheues glabrous. 



In dry, mostly open places. Nova Scotia to Florida, 

 Manitoba, Missouri and Texas. Other names are Pov- 

 •erty-. Chafe- or Balsam-weed, Old-field Balsam, Indian 

 Posey. Leaves of winter rosettes oblong. Aug. -Sept. 



2. Gnaphalium Helleri Britton. Heller's 

 Everlasting. (Fig. 3852.) 



G. Helleri Britton, Bull. Torr. Club, 20: 2S0. 1893. 



Similar to the preceding species, corymbosely or 

 somewhat pauiculately branched above, i^°-2° 

 high, the stem and branches densely glandular- 

 pubescent, not tomentose. Leaves oblong-lanceo- 

 late, sessile, acuminate at both ends, green and 

 hispidulous above, white-tomentose beneath, the 

 larger about 1' long and 5" wide, the uppermost 

 much smaller and narrower; heads very numerous, 

 corymbose or corymbose-paniculate, sessile or short- 

 peduncled in the clusters, about lYz" broad; invo- 

 lucre oblong, or becoming campanulate, 3" high, 

 its bracts bright white, tomentose, the outer oblong, 

 the inner linear-oblong, all obtuse ; pappus-bristles 

 distinct to the base, separately deciduous ; achenes 

 glabrous. 



In fields, southeastern Virginia to Georgia. Sept.-Oct. 



3. Gnaphalium decurrens Ives. Clammy Everlast- 

 ing. Winged Cudweed. (Fig. 3853.) 



<ynaphatiiim deoirrens Ives, Am. Journ. Sci. I: 380. pi. i. 1S19. 



Annual or biennial, similar to the two preceding species, frag- 

 rant; stem very leafy, glandular-viscid, corymbosely branched 

 -above, 2°-3° high. Leaves lanceolate or broadly linear, acutish 

 at the apex, densely white-woolly beneath, glabrate or loosely 

 -woolly above, sessile and decurrent on the stem at the base, 

 I '-3' long, 2"-3" wide, or the lowest shorter and slightly 

 spatulate; heads in several or numerous corymbose glomerules 

 of 2-6, about 3" high ; bracts of the involucre white or brownish, 

 ovate, acutish or the inner lanceolate and acute, the outer woolly 

 at the base ; pappus-bristles distinct, separately deciduous ; 

 achenes glabrous. 



In open, moist or dr>' places. Nova Scotia to Pennsylvania, west to 

 As'esttrn Ontario, Michigan and British Columbia, south in the Rocky 



Mountains to Arizona. 

 July- .Sept. 



Also called .Sweet Balsam and Balsam-weed. 

 26 



