400 



COMPOSITAE. 



[Vol. III. 



8. Antennaria dimorpha (Nutt.) T. & 

 G. Low Everlasting. (Fig. 3849.) 



Gnaphalium dtmorphum Nutt. Trans. Am. Phil. 



Soc. (II) 7: 405. 1 841. 

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



Tufted from a thick woody often branched 

 caudex, i / -i^ / high. Leaves all in a basal 

 cluster, spatulate, white-canescent or tomentose 

 on both sides, obtuse or acutish, Yz'-i' long, 

 l // -2 // wide, narrowed into short petioles; heads 

 of staminate flowers about y / 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 staminate flowers slender, scarcely thick- 

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

 tillate flowers of fine and smooth bristles. 



Dry soil, Nebraska to Utah and California, north 

 to Montana and British Columbia. April-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. Staminate 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 margaritaceum 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 / -8 / broad; heads very numerous, 

 short-peduncled 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, California and northern Asia. Adven- 

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



45. GNAPHALIUM L. Sp. PI. 850. 1753. 



Woolly 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, minutely dentate or 3-4-lobed. Central flowers perfect, tubular, few, their 

 corollas 5-toothed or 5-lobed. Anthers 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.] 



About 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. obtusifolium. 



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



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. palustre. 



