GENUS 43. 



THISTLE FAMILY. 



453 



12. Antennaria dimorpha (Nutt.) T. & G. 

 Low Everlasting. Fig. 4404. 



Gnaphalium dimorphum Nutt. Trans. Am. Phil. Soc. 



(II) 7: 405. 1841. 

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



Tufted from a thick woody often branched cau- 

 dex, i'-ii' high. Leaves all in a basal cluster, spatu- 

 late, white-canescent or tomentose on both sides, 

 obtuse or acutish, i'-i' long, i"-2" wide, narrowed 

 into short petioles; heads of staminate flowers 

 about 3" broad and high, solitary and sessile 

 among the leaves, or raised on a very short spar- 

 ingly leafy stem, with obtuse or obtusish brown- 

 ish involucral bracts, those of pistillate flowers 

 longer, their inner bracts linear-lanceolate, acumi- 

 nate ; pappus of the staminate flowers slender, 

 scarcely thickened, but barbellate at the tips, that 

 of the pistillate 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: 271. 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 oblonfc 

 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 filiform 

 corolla, an undivided style, and a pappus of slender bristles, not thickened at the summit, or 

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

 2-cleft style, and a pappus of capillary bristles. [Greek name of some similar plant.] 



About 35 species, natives of the north temperate zone. Besides the following, 2 or 3 other 

 species occur in western North America. Type species: Anaphalis nubigena (Wall.) DC. 



i. Anaphalis margaritacea (L.) Benth. & 

 Hook. Pearly or Large-flowered Ever- 

 lasting. Fig. 4405. 



Gnaphalium margaritaceum L. Sp. PI.. 850. 1753. 

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

 A. margaritacea Benth. & Hook. Gen. PI. 2 : 303. i3tyS. 



Stem floccose-woolly, corymbosely branched at the 

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

 narrowed to a sessile base, revolute, green, but mostly 

 more or less pubescent above, woolly beneath, 3'-5' 

 long, 2"-4" wide, the lowest shorter, spatulate, usually 

 obtuse ; corymb compound, 2'-8' broacj ; heads very nu- 

 merous, short-peduncled or sessile, about 3" high, 4" 

 broad when expanded ; involucre campanulate, its 

 bracts ovate-lanceolate, obtuse, finely nearly 



white, mostly glabrous; pappus-bristles of the fertile 

 flowers distinct and falling away separately. 



Dry soil, Newfoundland to Alaska, Pennsylvania, Kansas, 

 Oregon and northern Asia. Recorded south to North Caro- 

 lina. Adventive in Europe. Silver-leaf. Life-everlas f ing. 

 Moonshine. Cotton-weed. None-so-pretty. Lady-never-fade. 

 Indian-posy. Ladies'-tobacco. Poverty-weed. Silver-button. 

 July-Sept. 



Anaphalis OCCidentalis (Greene) Heller, occurring from Alaska to California and in New- 

 foundland and Quebec, differs by its mostly broader leaves being green and glabrous. 



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



Woolly erect or diffusely branched herbs, with alternate leaves, and discoid heads of 

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

 flat, concex 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 cap- 

 illary bristles, sometimes thickened above. [Greek, referring to the wool.'] 



About 120 species, widely distributed. Type species: Gnaphalium luteo-album L. 



i. Pappus-bristles distinct. 

 Tall, erect ; inflorescence corymbose, or paniculate. 



Leaves sessile ; plant not viscid. i. G. obtusifplium. 



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



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



