COMPOSITJE. 



182 



TUBDLIFLORJE. 



Conspectus of the Genera. 



SbBORDER r, tubuliflorj:. 



Corolla of the perfect flowers tubular, regular, 5-toothcd or lohcd. 

 Section I. Heads discoid. 



f5 



X ■ 



( Pappus capillar^'. 

 ( irrcen. | Pappus plumose. 

 ( Snales imbric. | cijlured. Slcins winged, 

 r Flowers all \ Scales in one j Pappus capillary, 

 perfecl. (row. ... '' v.,,nn„. rlv^.Tv 



Fls. not 

 all perfecl 



Verywnia. 1 



Liatris. 4 



Ammobium. 46 

 Cucalia. 40 



Pappus chaffy. ' . . . Stevia. 6 



(Rccep. not I Hds\\ereTog3.mo\is.Gnaplialium. 42 

 ] chaffy. ... I Heads dicEcious. Antennaria. 43 

 ' Scales colored. ( Recepiacles chaffy. . . F'dngo. 



Ray (lowers I Scales imbricate. Plucliea. 

 small fert. j Scales calyculate Erechtites. 

 Scales ( Herbs { Ray liowers large, sterile. Centaurea 



green. | Shrubby ; heads dioecious. . . Baccharis. 



Achenia smooth. Clrcium. 



{with spinose I Scls. acute, cuspid \ Ach. rugose, 4-angl Oiiopoitlon 

 leaves I Scales emarginate-mucronate. . . Ci/naia. 

 J Hds. homogaraous. Lappa. 

 with spinose ( Spines uncinate... 1 Hds. heXerocephalous. Xanthium. 55 

 heads only I Spines straight; involucre l-flowered. Echinnps. 

 I Scales 8 — .50. EupaturiuTn. 



( Pappus capillary.. ( Scales 4 — 5. . Mikania. 



SFls. all perfect.. \ Pappus of 5— 10 chaffy scales. . . Agemtum. 

 i Heads monoecious. . . Jva. 

 Flowers not all perfect. \ Heads heterocephalous. . Ambrosia. 



.\ch. crowned with a large disk. Tanacelum. 

 .^ch. crowned with a small disk. Artimisia. 

 ( in 2 series, the outer one leafy. Bidens. 

 reen, | in 1 scri.orslighlly calyculate. Sfjierio. 



Leaves 

 opposite. 



Flowers 

 yellow. 



Marginal 



Scales 

 unarmed. 



dry. 



corois small. ( Scales armed with spinose appendages. 

 Marginal corollas large, sterile. .... 



Ciiicus. 

 Centaurea. 



Section II. Heads radiate. 



f Involucre j Pappus s 



) imbricalp. ( Pap dou 



} Invol. not j Outer sc 



: ' imbricate. | Outer sc 



( Hds. very large. /nj«/a. 

 Pappus simple ( Heads small. Solidaso. 

 double; heads roiddl size. 

 ( flat of ) Invol. not I Outer scales very short or 0. 

 Fueceptacl \ convex ' imbricate. | Outer scales equal to the inner, 

 not chaffy ; ( conical or globose ; outer row of scales longest. . 

 .y, , I Achenia quadrangular. . 



J ( Receptacle chaffy, conical 1 Achenia compressed. . - - „.- 



^ ' r Invol. double, I retrorselyhisp. awns. J5u/cni. 



( Raysster. \ Achenia with j erectly hispid awns. Coreopsis 

 •2 ( flat or Idiskperf . ( Invol. imbric. inSormore rows. Helianlhus- 



% \ convex. ( Rays fertile, disk sterile. Achen. wingless. Polymnia 



^[Recepta- j ( Outer scales spreading leafy 



o \ cle chaffy ; ' conical ; ravs fertile, j Outer scales appressed. 

 M < ( Involucre of tiisiinct scales in a rows. 



^ ' Recept. not chaffy. . j Involucre of 5 united scales in 1 n>w. . 

 Leaves all radical, cordate, appearing alter the solitary heads. . 

 I Heads corymbose, somewhat dioecious. 



Leaves all radical ) Heads soli'tary, heterogamous. . . - - . 



( Ach. very silky. RaysaboutS. Serwcarpus. 

 Pap.simpl. I Ach.smoothish. Rays6-100. After. 

 Pappus double ; involucre imbricate. Oipiopfippiis. 



i Involu. depressed. Lnica.nth(rnum. 

 Receptacl. '| ( I^vs. sinnate-lobed. | In vo. hemispherical Chrysanthemum 



I not chaffy ; [naked. . ( Lvs.notlobed; invol. sub-simple raysSO— 200. JEWirfroTi 



Chrysopsis. 



Senecio. 



Calendula. 



Helenium. 



Rudbeclcia. 



Lepachys. 



Heliopsis. 



Sanvitatia. 



Arnira. 



Tagetcs. 



Tussilago. 



Nurdosmia. 



Bellis. 



alveo- 

 late. . . 



Rays pistillate. 

 I Receptacle chaffy. . . ( Disk fls. yellow. . . . ) Hays neutral. . 

 (Lvs. finely divided.) ( Disk flowers while; rays pisiillate. . . 

 j Receptacle conical, with large pate. 

 ( simple.. I Receptacle flat, (rays rose-coloror white.) 

 iS 1^ Lvs. opposite, I pinnate ; inner involucre of S united scales. 



Anthemis. 



Miiruta. 



Achillea. 



Zinnia. 



Ciireopsis. 



JJahiia. 



