154 ORDER 70. COMPOSITE. 



d Achenia 13-striate. Flowers purple BRICKKLLIA. 9 



d Achenia 5-angled. Receptacle conical. Flowers bine ..CONOCLINIDM. 12 



Receptacle flat. Scales 4 or 5 MIKANI A. 1 1 



Scales 820 EUPATORIUM. 10 



(Shrubs. Flower dioecious, the $ and in different beads BACCHARIS. 34 



e Herbs. Stem winged. Heads spicate PTEROCAULOS. 35 



Stem wingless. Heads, corymbous, purplish PLUCHEA. 3.'t 



Heads paniculate. Pappus reddish CONYZA. 31 



Pappus white ERECHTITKS. 85 



' Receptacle chafly except in the centre FILAGO. 80 



/ Receptacle naked. Heads dioecious ANTENNARIA. 79 



Heads heterogamous. Involucre erect GNAPHALIUM 7B 



Involucre radiaU. HELICHRYSUM. 83 



g Scales dry, fadeless. Pappns 4 teeth. Stem winged AMMOBIUM. 81 



g Scale* dry, fadeless. Papons of scale-like awns... XKRA.NTHEMUM. 84 



g Scales herbaceous. Flowers heterocephalous. Fruit a burr XA.NTHIUM. 48 



Flowers all perfect. Pappus of 5 or 6 scales MARSRALLIA. 69 



Pappus of many bristles CARPHEPHOKUS. 6 



h Flowers yellow. Pappns 2 inversely hispid awns BIDKNS. 59 



A Flowers yellow. Pappus 2 erectly hispid a\vns COREOPSIS. 58 



k Flowers whitish, heterocephalous. Anthers yellowish AMIIROSIA. 47 



monoecious. Anthers yellow :.. .IvA. 46 



all perfect. Anthers black MKLASTIIKRA. 49 



f Outer scales of the in vol. leafy. Pappus none CARTHAMUS. 91 



t Outer scales pectinate or ciliate-fringed, or entire CE.STAUKEA. 93 



/ Pappus plumons. Achenia obovate OY.NARA. 90 



f Pappus plumous. Achenia oblong CIRSIUM. 97 



f Pappus scabrous, triple, each row by 10'.. ----- CNICUS. 95 



simple. Scales spinesceot, _ ONOPORDON. 96 



Scales hooked LAPPA. 98 



t Leaves opposite. Pappns scales deeply cleft into bhstlet DYSODIA. 62 



fc Leaves alternate. Receptacle with deep horny cells BALDWIXIA. 68 



Receptacle with shallow fringed cells GAILLARDIA. 63 



Receptacle areolate. Rays all yellow HELLKNIUM. 67 



Rays spotted at base t GAZANIA. 64 



' Leaves opposite. Involucre double, outer 8 united DAHLIA. 23 



i Leaves opposite. Involucre single Scales united TAGETF.S. 91 



I Leaves alternate. Pappus of a few short awns or bristles BOLTONJA. 24 



Pappus a membranous margin MATRICARIA. 73 



Pappus 0. Rays fertile, disk sterile CALENDULA. 91 



Flowers all fertile. Involucre scales equal BELLIS. 22 



Invol. broad, flat LEUCANTHEXUM. 72 



Invol. hemispherical CHRYSANTHEMUM. 75 



"1 Rays 4 or 5 Involucre oblong, imbricated. Cypsela very silky SERICOCARPCS. 17 



/ Rays 5 75 Involucre loosely or closely imbricated. Pap. simple, copious. . .ASTER. 18 



w Rays 8 12 Involucre imbricated. Pappus double, the outer very short DIPLOPAPPUS. 19 



m Rays 40 200. Involucre scarcely imbricated, scales nearly equal ERIGERON. 20 



n Flowers dioecious, purplish. Leaves all radical .... XARDOSMIA. 14 



Flowers all fertile. Native. Scales subequal, flat. Fruit smootliish ERIGERON. 20 



Exotic. Scales subequal, keeled. Fruit hairy AGATHEA. 18 



Exotic. Scales imbricated. Inppus double CALLISTEPHCS. 21 



o Pappus double in the disk flowers, none in the rays HETEROTHECA. 29 



o Pappus double in both disk and ray flowers CHRYSOPSIS. 30 



p Heads large, about 20-rayed. Pappus in one row INULA. 32 



f> Heads very small, 1-15-rayed. Pappus 1 row, shorter than achenia BRACIIYCII.ETA. .5 



Pappus 1 row, tawny, longer than achenia. ISOPAPPUS. 28 



Pappus irregularly 2-rowed, white SOLIDAGO. '26 



r Head solitary, on a scape with alternate bracts TUSSILAGO. U 



r Heads corymbed, <tc. Leaves alternate SKNECIO. 87 



Leaves opposite ARNICA. 8? 



4 Shrubby. I'appus 4-toothed, obscure BOBRICHIA. 3d 



t Uarbuceous. Scales (the 4 outer) united iuto a. cup TKTRAGONOTIIKCA. 52 



