SYNGENESIA. 



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SYNGENESIA. 



HYMENOPAPPUS Calix many-leaved, spreading; leaflets 

 suboval, coloured ; receptacle naked ; pappus paleaceous, 

 many-leaved ; segments very short and obtuse, awnless. 



KRIGIA Calix many-leaved, simple ; receptacle naked ; 

 pappus double, external membranaceous, five or eight 

 leaved, interior about five, eight, or twenty-four scabrous 

 setse. 



KiniNiA Flowers floscular; calix imbricated, oblong, 

 cylindrical; down plumose; receptacle naked; style 

 deeply bifid ; stigmas club-shaped ; anthers distinct. 



LAVENIA Calix nearly regular; style bifid; down three- 

 awned, glandular at the tip; receptacle naked. 



LIATRIS Calix oblong, imbricate, awnless, coloured; down 

 feathered, coloured ; receptacle naked, hollow, dotted. 



MARSHALLIA Calix imbricate, scales sublanceoLate, in- 

 cumbent; receptacle paleaceous ; pappus of five mem- 

 branaceous, acuminate, nerveless scales. 



MELANANTHERA Calix imbricate, leaflets ovate, appressed, 

 subequal ; receptacle paleaceous, scales carinate, the lower 

 part embracing the florets ; pappus consisting of four or 

 five unequal unarmed awns. 



MIKANIA Calix four or six leaved, equal, four or six 

 flowered; receptacle naked ; pappus pilose. 



POLYPTERIS Calix many-leaved, spreading; leaflets sub- 

 oval, coloured; receptacle naked; pappus paleaceous, 

 about twelve-leaved ; leaflets rigid and cuspidate, the 

 length of the seed. 



ROTHIA Receptacle, in the ray chaffy, in the disk villose; 

 calix of many equal scales ; seed in the ray bald, in the 

 disk pappose. 



SPARGANOPHORUS Calix subglobose, imbricate, scales re- 

 curved at the point ; receptacle naked ; seed crowned with 

 a small subcartilaginous cup. 



STOKESIA Corollets in the ray funnel-form, longer, irre- 

 gular; down four-bristled ; receptacle naked. 



TROXIMON Calix oblong, conic, many-leaved, leaflets un- 

 equal, imbricated ; receptacle naked, puncticulate ; pappus 

 sessile, pilose. 



VERONIA Receptacle naked; calix ovate, imbricated; 

 florets tubular, five-cleft; seed-down double, the outer 

 chaffy, short, inner capillary. 



ZACINTHA Receptacle naked ; seeds of the circumference 

 incurved ; of the centre, straight ; down very short, finely 

 feathered ; outer calix membranaceous, inner .with eight 

 protuberances. 



2. POLYGAMIA SUPERFLUA. 



(In this Order, the florets of the centre have both stamens 

 and pistils ; those of the circumference, pistils only.) 



1. Tubulous. 



TANACETUM, Tansy Calix imbricate, hemispherical ; co- 

 rolla, rays obsolete, trifid, sometimes wanting; seed 

 crowned with a border; receptacle naked. 



GNAPHALIUM, Everlasting, and Cudweed Calix imbricate, 

 with the marginal scales rounded, scariose, coloured ; 

 down feathered, or simple; receptacle naked. 



XERANTHEMUM, Everlasting Flower Receptacle scaly; 

 down of taper-pointed scales ; calix imbricated, its inner 

 scales forming a coloured spreading radius. 



CARPESIUM Calix imbricate, the outer scales reflex; down 

 none; receptacle naked. 



BACCHARIS, Ploughman s Spikenard Calix imbricate, cylin- 

 drical ; florets, female mixed with hermaphrodites ; down 

 simple; receptacle naked. 



COTCLA, May-weed Receptacle almost naked; down mar- 



gined ; corollules of the disk four-cleft ; of the ray, 

 scarcely any. 



CONYZA, Fleabane Calix imbricate, roundish ; corolla of 

 the ray three-cleft; down simple, naked. 



2. Radiate. 



ERIGERON Receptacle naked ; down hairy; florets of the 

 ray linear, numerous, and very narrow. 



TUSSILAGO, Coifs-foot Calix scales equal, as long as the 

 disk, somewhat membranuceous ; down simple; receptacle 

 naked. 



SENECIO, Groundsel Calix cylindrical, calicled with scales 

 sphacelate at the tip; down simple; receptacle naked. 



ASTER, Starwort Receptacle naked; down simple; corolla, 

 rays more than ten ; calix imbricate ; lower scales 

 spreading. 



SOLID* oo, Golden Rod Calix scales imbricate, closed; 

 corollets of the ray about five; down simple; receptacle 

 naked. 



INULA, Elecampane, and Fleabane Receptacle naked; 

 down simple; anthers ending in two bristles at the base. 



CINERARIA, Sky-flower Calix simple, manj-icaved, equal; 

 pappus simple ; receptacle naked. 



ARNICA, Mountain Leopard's Bane Receptacle naked; 

 clown simple ; corollules of the ray with five filaments 

 without anthers. 



DORONICUM, Leopard's Bane Calix scales in two rows, 

 equal, longer than the disk; seeds of the ray naked, and 

 destitute of down; down to those of the disk, simple; 

 receptacle naked. 



PERDICIUM Corollets bilabiate; down simple; receptacle 

 naked. 



HELENIUM, Bastard Sun-flower Calix simple, many- 

 parted; corollets of the ray semi-trifkl ; down five-awned; 

 receptacle naked, excepting the calicine chaffs in the ray. 



BELLIS, Daisy Calix hemispheric, with equal scales; seeds 

 ovate, with no down ; receptacle naked, conical. 



LEYSERA Calix scariose; down chaffy, in the disk feathery 

 also; receptacle subpaleaceous. 



TAGETES, French, African, and Chili Marigolds Calix one- 

 leafed, five-toothed, tubular ; florets of the ray five, per- 

 manent; down with firm erect chaffs; receptacle naked. 



PECTIS Calix five-leaved, cylindric; florets of the ray five; 

 down awned ; receptacle naked. 



CHRYSANTHEMUM, Corn Marigold Calix hemispherical, 

 imbricated, the marginal scales membranaceous ; pappus 

 margined ; receptacle naked. 



MATRICARIA, Fiiverfew Calix hemispherical, imbricate, 

 the marginal scales solid, sharpish; down none; recep- 

 tacle naked. 



ANACYCLUS Calix imbricate; corollets of the ray undi- 

 vided ; down simple ; receptacle chaffy. 



ANTHEMIS, Chamomile Receptacle chaffy; down none; 

 calix hemispherical, nearly equal; floscules of the ray 

 more than five. 



ACIIILLEA, Milfoil Calix ovate, imbricate; florets of the 

 ray about four; down none; receptacle chaffy. 



TRIDAX Calix imbricate, cylindrical; corollets of the ray 

 three-parted; down many-rayed, simple ; receptacle 

 chaffy. 



ZINNIA Receptacle chaffy; seed-down of two, erect, un- 

 equal claws; calix imbricated, somewhat ovate; florets of 

 the ray from five to ten, permanent, undivided. 



VERBESIMA Calix in a double row; florets of the ray about 

 five ; pappus awned ; receptacle chaffy. 



SIGESBECKIA Calix, exterior five-leaved, inner spreading ; 

 ray halved; pappus none; receptacle chaffy. 



