COMPOSITE. 



than one series, very short and roundish or obtuse style-appen.la-r's. small akenes fur the 

 greater part 2-nervecl 3 ami more scanty or fragile pappus, in manj with a . oni , ,, nous .hurt 

 outer series. 



Subtribe III. CONYZE/E. Characters of the preceding subtribe ; but corolla of the 

 numerous female flowers reduced to a filiform or short and narrow tube wholly des- 

 titute of ligule. 



50. CONYZA. Heads small, many-flowered. Bracts of the campanulate involucre narrow 

 inappendiculate, in 1 to 3 series, Female flowers much more numerous than th- hermaphro^ 

 dite; tlieir filiform or slender tubular corolla shorter than the disk an. I style, truncal 

 2-4-toothcd at the apex. Akenes small, compressed. Pappus a single scries of suit capillary 

 bristles, sometimes an added outer series of short bristles or 



Subtribe IV. BACCHARIDE.E. Heads discoid and unisexual. Corolla of the fertile flow- 

 ers filiform. Pappus of capillary bristles. 



51. BACCHARIS. Pleads completely dioecious, many-flowered. Involucre regular! v im- 

 bricated, of squamaceous bracts. Receptacle mostly flat and naked, rare! By; Flowers 



of the male heads with tubular-funnelform 5-cleft corolla, and stylo-!, r.ui.-b, - as <>f Aster <>r 

 Solidayo, but the stigmatic portion obsolete and ovary aborthe"; bhe female ii!i corolla 

 reduced to a slender truncate or minutely toothed tube, shorter than the filiform - 

 Akenes 5-10-costate. Pappus of the male flowers of a series of s-ahmiis and often torn 

 and more or less clavellate bristles; of the fertile flowers of usually more numerous and line 

 bristles, and often elongated in fruit. Shrubby or some herbaceous. 



TRIBE IV. INULOIDE^E. Heads heterogamous and either radiate or discoid ; the 

 female flowers being either ligulate or filiform (rarely open-tubular), or sometimes 

 hornogamous and tubuliflorous. Anthers sagittate, and the bas ( > of the lobe* produced 

 into more or less of a tail (caudate) or other appendage. Style-branch.-- of the her- 

 maphrodite flowers filiform or flatfish, not appendaged ; the stigmatic lines running to 

 or vanishing near the loundisb or truncate tip, which is at raosl j'lpillo.-e or somewhat 

 penicillate: style of staminate-sterile flowers commonly entire. Pappus usually capil- 

 lary or none. Leaves mostly alternate and heads homochromons ; the involucre com- 

 monly dry or scarious. rarely foliaceous. See also Senecionitl' <i : . suid ril.e 7 .-' !'jinccB< 

 (No North American species has conspicuous rays, except a naturalized 



Subtribe I. PLUCHEINE.E. Heads discoid, heterogamous and mostly androgynous. In- 



volucre more or less dry, but hardly scarious. Receptacle not paleaceous. I', male 

 flowers with filiform corolla. Adjacent anther-tails or acuminate bases connate, at 

 least in our genera. 



52. PLUCHEA. Heads many-flowered, largely of female flowers, a few hermaphrodite but 

 usually sterile ones in the centre. Involucre imbricated, of coriaceous to submembranaceous 

 bracts ; the outer broad, all but the innermost persistent. Receptacle flat, naked and ijabrous. 

 Corolla of the female flowers reduced to a slender truncate or 2-3-toothed tube, shorter than 

 the style ; of the hermaphrodite-sterile ones regularly 5-clcft, the style either < ntire or 2-cleft 

 at apex. Akenes small, 4-5-angled or sulcate. Pappus a series of capillary and soft .or 

 rigid bristles. Heads cymosely clustered or scattered. 



53. PTEROCAULON. Heads and flowers as in Pluchea, but involucre of fe\ur and 

 linear or subulate bracts: these deciduous with the matured flowers, leaving a lew short 

 basal ones which are more persistent, mainly by their implexed wool. Receptacle HuaM, 

 naked, sometimes pilose. Heads glomerate aud the glomerules spicate. Perennial herbs. 



Subtribe II. FILAGIXE^E. Heads heterogamous, mo.-ily androgynous discoid. In- 

 volucre of few scarious or firmer bracts. Receptacle chaffy ; a chaff (palea) or 

 involucral bract enclosing or subtending each female flower or akene. Corolla of the 

 female flowers a filiform tube, shorter than the style ; of the few hermaphrodite com- 

 monly sterile flowers regularly 4-5-toothed ; their anthers sometimes only acutely 

 sagittate or auriculate at base, and the short style-branches or undivided style not 



