400 



COxMI'OSITAE. 



[Vol. III. 



8. Antennaria dimorpha (Nutt.) T. & 

 G. Low Everlasting. (Fig. 3849.) 



Gnaphalium dimorphum Nutt. Trans. Am. Phil. 



Soc. (II) 7: 40,5. 1841. 

 A. dimorpha T. & G. Fl. N. A. 2: 431. 1843. 



Tufted from a thick woody often branched 

 caudex, I'-i)^' li'S'i Leaves all in a basal 

 cluster, spatulate, white-canescent or tomentose 

 on both sides, obtuse or acutish, Y^'-V long, 

 \"-2" wide, narrowed into short petioles; heads 

 of staniinate flowers about 3" broad and high, 

 solitary and sessile among the leaves, or raised 

 on a very short sparingly leafy stem, with ob- 

 tuse or obtusish brownish involucral bracts, 

 those of pistillate flowers longer, their inner 

 bracts linear-lanceolate, acuminate; pappus of 

 the staniinate flowers slender, scarcely thick- 

 ened, but barbellalc at the tips, that of the pis- 

 tillate flowers of fine and smooth bristles. 



Dry soil, Nebraska to ftah and California, north 

 to Montana and British Columbia. .\pril-June. 



44. ANAPHALIS DC. Prodr. 6: 241. 1837. 



Perennial white-tomentose or woolly herbs, with leafy erect stems, in our species, alter- 

 nate entire leaves, and small corymbose discoid heads of dioecious flowers. Involucre ob- 

 long to campanulate, its bracts scarious, imbricated in several series, mostly white, the outer 

 shorter. Receptacle mostly convex, not chaffy. Stamiuate flowers with a slender or fili- 

 form corolla, an undivided style, and a pappus of slender bristles, not thickened at the sum- 

 mit, or scarcely so; anthers tailed at the base. Pistillate flowers with a tubular 5-toothed 

 corolla, 2-cleft style, and a copious pappus of capillary separate bristles. Achenes oblong. 

 [Greek name of some similar plant.] 



About 30 species, natives of the north temperate zone. 

 Only the following is known to occur in North America. 



I. Anaphalis margaritacea (L.) Benth. & 



Hook. Pearly or Large-flowered Everlasting. 



(Fig. 3850.) 



Gnaphalium margarilaceum L. Sp. PI. 850. 1753- 

 Antennaria margaritacea Hook. Fl.Bor.Am.I: 329. 1833. 

 A. margaritacea Benth. & Hook. Gen. PI. 2: 303. 1873. 

 Stem floccose-woolly, corymbosely branched at the 

 summit, leafy, i°-3° high. Leaves linear-lanceolate, 

 narrowed to a sessile base, revolute, green, but more or 

 less pubescent above, woolly beneath, 3'-5' long, 2"-4" 

 wide,the lowest shorter, spatulate,usually obtuse; cor- 

 ymb compound, 2'-S' broad; heads very numerous, 

 short-peduucled or sessile, about 3" high, 4" broad 

 ■when expanded; involucre campanulate, its bracts 

 ovate-lanceolate, obtuse, finely striate, pearly white, 

 mostly glabrous; pappus-bristles of the fertile flowers 

 distinct and falling away separately. 



Dry soil, Newfoundland to Alaska, North Carolina, Kansas,Califomia and northern Asia. Adven- 

 tive in Kurope. Silver-leaf, Life Everlasting:, Moonshine, Cotton-weed, None-so-pretty. July-Sept. 



45. GNAPHALIUM L. Sp. PL 850. 1753. 



W00II3' erect or diffusely branched herbs, with alternate leaves, and discoid heads of pis- 

 tillate and perfect flowers arranged in corymbs, spikes, racemes, or capitate. Receptacle flat, 

 convex or conic, not chaffy, usually foveolate. Pistillate flowers in several series, their 

 corollas filiform, minutelj- dentate or 3-4-lobed. Central flowers perfect, tubular, few, their 

 corollas 5-toothed or 5-lobed. .\nthers sagittate at the base, the auricles tailed. Achenes 

 oblong or obovate, terete or slightly compressed, not ribbed. Pappus a single series of capil- 

 lary bristles, sometimes thickened above, cohering at the base, or separately deciduous. 

 [Greek, referring to the wool.] 



.\bout 120 species, widely distributed, known as Cudweed, Cotton-weed, or Everlasting. 

 Tall, erect; inflorescence corymbose, or paniculate; pappus-bristles distinct. 



Leaves sessile; plant not viscid. i. G. obtusi/otium. 



Leaves sessile; plant glandular-viscid. 2. G. HelUri. 



Leaves decurrent; plant glandular-viscid. 3. G. decurrens. 



Low, diffuse; inflorescence mostly capitate; pappus-bristles distinct. 



Floccose-woolly; involucral bracts yellowish, or white. 4. G. patuslre. 



