COMPOSITE. 73 



•)— Involucre many-flowered, from hemispherical to cylindraceous ; the bracts strictly erect, 

 not membranaceous, persistent, from oblong to oval, more or less carinate-concave in fruit 

 and partly receiving the subtended aliene : herbage mostly floccose-wooUy, not impressed- 

 punctate nor resinous-atomiferous : leaves alternate or opposite. 



143. SYNTRICHOPAPPUS. Involucre narrow, of about 5 equal and oblong carinate- 

 concave thinnish-herbacenus bracts, whicli are partly wrapped around the ray-akenes. Re- 

 ceptacle flat. Ray-flowers about 5, with oval ligulcs 3-lobed or toothed at summit. 

 Disk-coroDas with lery short proper tube, and elongated fimnelform or cylindraceous throat, 

 the stamens therefore inserted near the base ; lobes 3, ovate-oblong. Anther-tips slender, 

 long-laucetihite or linear. Style-tips elongated-lanceolate, acute, flattened, of the -V.steroid 

 type. Akenes linear-turl)inate, 5-costate or angled, hairy. Pappus of numerous barbellu- 

 late white bristles in a single series, rather shorter than the disk-corollas, paleaceou.sly and 

 somewhat unequally united into a ring at ba>c, deciduous, or in the second species wanting. 

 Low and branching annuals, short-peduncled. 



143. ERIOPHYLLUM. Involucre from her.iispherical-campanulate to oblong, commonly 

 equalling the disk, of one or sometimes two series of oblong or narrower firm-herbaceous or 

 coriaceiius permanently erect brauts, either distinct or sometimes partially united into a cup, 

 at least in fruit concave or couca\e-carinate at centre, into which concavity tlie subtended 

 akenes are partially received. Receptacle from convex or rarely conical to plane. liay- 

 flowers usually with broad ligules, very rarely none. Disk-corollas with distinct and some- 

 times slender proper tube. Style-tips truncate, obtuse, or obscurely capitellate-conical. ■ 

 Akenes narrow, from clavate-linear to cuneate-oblong, mostly 4-angled. Pappus of nerveless 

 and mostly pointless (rarelj' awned or setiform) paleae. Floccose-tomentose or rarely glabrate 

 herbs, rarely suffruticose. 



4— ■}— Involucre many- (at lea-t 12-20-) flowered ; the bracts wholly herbaceous, not colored 

 nor scarious-tipped, broad or broadisli, plane or merely concave, equal and in a single or 

 hardlv double series, not embracing akenes: receptacle small: corolla-lolies or teeth 

 short : herbaii'e destitute of im])ressed punctures and resinous ati.-ms, not floccose-lanate. 



1 44. B AHI A. Involucre hemispherical or obovate and lax or open in fruit ; the plane 

 liracts distinct to and commonly narrower at the base. Receptacle small, mostly flat. 

 Female flowers with exserted ligules, or rarely none. Style-tips trmicate or obtuse. -Vkenes 

 narrow, quadrangular. Pappus (rarely wanting) of several scarious pale*, with callous- 

 thickened opaque base, which is sometimes extended into a strong miduerve (costa), 



145. AMBLYOPAPPUS. Characters of Bahia; but involucre of only 5 to 6 broadly 

 obovate bracts, their centre in age more or less carinate-concave; small receptacle conical; 

 .head discoid ; corollas all short-tubular, and in the few female flowers minutely 2-3-toothed, 

 shorter than the stxle, in the hermaphrodite flowers 5-toothed, the teeth soon connivent. 

 Akenes elongated-obpyramidal, pubescent. Pappus of 8 to 12 oblong obtuse rather firm 

 palese, with merel_v thickened base and no costa, nearly equalling the corollas. 



.)_ 4_ H_ Involucre 3-9-flowered ; its bracts few, equal, broad and with roundish more or 

 less scariiius-petaloid summit, concave-cariuate : coroUas only 3-toothed : herbage minutely 

 impressed-punctate and resinon.s-atomiferous, 



146. SCHKUHRIA. Ileails effusely paniculate. Involucre clavate-turbinate or obpj-rami- 

 dal, of 4 or 5 erect bracts and sometimes an accessory bractlet at base. Receptacle very 

 small. Female flowers onlv one or two, with a short or sometimes obsolete hgule not ex- 

 ceeding the hermaphrodite flowers, or altoffether wanting. Akenes obpyramidal-tetragonal, 

 the faces not rarely 2-3-striate. Pappus of 8 scarious paleae, the larger often equalling the 

 short corolla, either nerveless with caUons-thickened base, or with a prominent costa. Leaves 

 or their divisions filiform. 



^_ H_ H_ H_ Involucre many- (rarely 12-15-) flowered; its bracts mostly appressed, with 

 scarious-membranaceous and usually colored tips and sometimes margins: disk-coroUas 

 deeplv 5-cleft : anthers partly or wholly exserted : leaves alternate, not impressed-punc- 

 tate except in Hi/menopappus: receptacle small and flat: heads except in two species 

 homogamous : flowers seldom yellow, but sometimes so. 



147. HYMENOTHRIX. Involucre turbinate-campanulate, or in age more open, about 

 30-floWered, shorter than the disk ; its principal bracts 7 to 1 0, obovate or lanceolate-oblong. 



