CLASS XVII. ORDER TI. 
61 
Chrysoco'ma. Calyx imbricate, oblong; receptacle naked ; egret hairy, scab- 
rous ; seed pubescent, (golden-locks.) 
Caca'lia. Calyx cylindric, scaly at the base ; receptacle naked; egret hairy, 
(wild-caraway.) 
Spargano'phorus. Calyx sub-globose, imbricate ; scales secured at the point ; 
receptacle naked ; seed crowned with a cartilaginous, shining cup. (water- 
crown-cup.) /S. 
Santoli'na. Calyx imbricate, hemispherical ; scales keeled, with scarious 
points. S. 
ORDER n. POLYGAMIA SUPERFLUA. 
A. Flowers discoid ; the ray-florets being obsolete. 
Tanace'tum. Calyx imbricate, hemispheric ; scales acuminate ; rays obso- 
lete. 3-cleft ; egret somewhat marginal ; receptacle naked ; flowers corymbed. 
(tansey.) 
Artemi'sia- Calyx imbricate, ovate, with scales rounded, converging ; ray- 
florets subulate ; egret 0 ; receptacle somewhat villose, or nakedish ; flowers 
mostly rounded, (wormwood, southern-wood.) S. 
Gnapha^lium. Calyx imbricate, with the marginal scales rounded, scarious, 
shortish, glossy, coloured ; receptacle naked ; egret pilose or plumose, scabrous; 
fiorets of the ray subulate, of the disk entire. Sometimes all the florets are 
perfect, (life everlasting.) 
Bac'^charis. Calyx imbricate, cylindric ; scales ovate, sub-coriaceous ; fer- 
tile florgis mixed with the perfect; receptacle naked ; egret hairy, (groundsel- 
tree.) 
B. Flowers radiate ; the ligulate ray-fiorets very manifest. [Receptacle naked.] 
Eri'gerqn. Calyx imbricate, sub-hemispherical; florets of the ray very 
numerous and narrow; receptacle naked; egret double, outer minute, inner 
hairy, of few rays. 
In'ula. Calyx imbricate, generally squarrose ; egret simple, scabrous, some- 
iimes a minute, exterior, chaffy one ; anthers ending in 2 bristles at the base; 
ray-florets numerous ; always yellow, (elecampane.) 
As"ter. Calyx imbricate, the inferior scales generally spreading ; egret sim- 
ple, pilose; receptacle often deep-pitted; florets of the ray more than 10, except 
in a few species; colour purple or white, never yellow, (star-flower.) 
Soltda'go. Calyx oblong or sub-cylindric, with oblong, narrow, pointed 
straight scales, imbricate, closed upon the flower ; ray-florets about 5, and fewer 
than 10, lanceolate, 2-toothed, equal to, or shorter than, the calyx ; filaments 
capillary, very short; style thread-form, equalling the length of the stamens, 
5tigma-cleft, spreading; egret simple, pilose, scabrous; receptacle furrowed 
wiih dots or punctures ; seeds oblong, ovate ; yellow, (golden-rod.) 
Tussila'go. Calyx simple, swelling ; scales equal, and equalling the disk, 
sub-membranous ; pistillate florets ligulate or without teeth ; egret simple, ses- 
sile ; sometimes polygamous, (colt's-foot.) 
CHRYs.iN''THEMUM. Calyx hemispherical, imbricate, with the scales membra- 
nous at the margin ; egret none, or a narrow margin, (ox-eyed daisy, fever- 
few.) 
Bel^'us. Calyx hemispherical; scales equal; egret 0; receptacle conical; 
seed ovate, (garden daisy.) Ex. 
Tage'tes. Calyx simple, 1-leafed, 5-toothed, tubular ; florets of the ray about 
5, permanent ; egrec 5 erect awns, (marygold.) Ex. 
Arni'ca. Calyx hemispherical, leafets equal, longer than the disk; receptacle 
naked ; egret simple, hairy ; florets of the ray yellow, often destitute of anthers. 
Sene'cio. Calyx sub-cylindric, equal, scaly at the base; scales withered at 
the points; receptacle naked; egret simple; rays sometimes wanting, (firc- 
weed.) , 
Bolto'nia. Calyx imbricate; raj's numerous; receptacle conic, punctate; 
seeds flat ; egret consisting of minute bristles, with 2 elongated and opposite 
bristles, (false chamomile.) 
Chrysop'^sis, Calyx imbricated, ray-florets mostly yellow ; receptacle naked \ 
egret double; outer "one chaffy, minute, inner one scabrous, niany-rayed. (S. 
Dahlia. See description of species. 
[Receptacle chaffy or hairy.] 
An"themis. Calyx hemispherical; scales with scarious margins, nearly 
