CLASS XVII. ORDER 11. 
365 
Ste a sa. Receptacle naked ; egret chaff- 
bristlec involucre cylindric, from a simple 
series c ' ^eafets. <S\ 
Bkic*. i;L"T.i i.. Receptacle naked, dotted ; 
egret ha. y or scabrous ; akenes nearly gla- 
brous, 10 jtreaked ; involucre many -leaved, 
ijubricate. S. 
C. Fhyt ets tuhulous ; Jlower discoid. 
Eupato'rium. Calyx imbricated (rarely 
simple), oblong ; style long, cloven half vi^ay 
3own ; egrut pilose, scabrous, or i-ough pa- 
pillose ; receptacle naked ; seed smooth and 
glandular, 5-striate. (boneset, thorough- 
wort, joepye) 
Mika'nia. Calyx 4-6-leaved, 4 6-flow^er- 
a.l , receptacle naked ; egret pilose. 
KuH NiA. Calyx imbricate, cylindric; re- 
ceptacle naked ; egret plumose, sessile ; 
aeed pubescent, striate, (false bone.set.) 
Polyp"ter)[s. Involucrum many-leaved, 
leaves oval ; egret chatFy, many-leaved, the 
chaff broad-suLulate. cuspidate, rigid, as 
long as the seed. 
Chuysoco'ma. Calyx imbricate, oblong; 
receptacle naked ; egret hairy, scabrous ; 
aeed punescent. (golden-locks.) 
Caca'lia. Calyx cylindric, scaly at the 
base , receptacle uaked ; egret hairy, (wild- 
laraway.) 
Sparganoph^orus. Calyx sub-globose, 
imbricate ; scales secured at the point ; re- 
ceptacle naked ; seed crowned with a car- 
tilaginous, shining cup (water-crow^n-cup.) 
S. 
Marshal''i.ia. Involucrum imbricate; 
scales sub-lanceOifcte, incumbent ; recepta- 
cle chafFy : egi-et 5, membranaceous, acu- 
.iiinate ; nerveless scales. 
Melananth k'ra. Involucrum imbri- 
cate ; leafets ovate, close-pressed, sub-equal ; 
receptacle chaffy ; scales keeled, the lower 
part embracing the florets ; egret consisting 
of 4 or 5 unequal, unarmed awns. 
Santoli'na. Calyx imbricate, hemi- 
spherical ; scales keeled, with scarious 
points. S. 
Agkra'tum. Egret with 5 somewhat 
awned scales ; leaves of the calyx oblong. 
In a double row ; corolla 4 or 5-cleft ; recep- 
tacle naked. Ex. 
ORDER II. POLYGAMIA SUPERFLUA. 
A. Flowers discoid ; the ray-jiorets being 
obsolete. 
Tanace'tum. Calyx imbricate, hemi- 
upheric ; scales acuminate ; rays obsolete, 
3-cleft ; egret somewhat marginal ; recepta- 
cle naked ; flowers corymbed. (tansey.) 
AuTEMr'siA. Calyx imbricate, ovate, with 
scales rounded, converging ; ray-florets sub- 
ulate; egret 0; receptacle somewhat vil- 
ose, or nakedish ; flowers mostly rounded, 
(wormwood, southeni-wood.) 6. 
Gnapha'lium. Calyx imbricate, with the 
marginal scales rounded, scarious, shortish, 
glos.sy, colored ; receptacle naked ; egret 
pilose or plumose, scabrous ; florets of the 
ray subulate, of the disk entii-e. Sometimes 
ftU the florets are perfect, (life everiastiag.) 
Cony'za. Involucre imbricate, tlje scales 
appressed ; receptacle naked ; marginal 116 
Vets fertile, 3-cleft ; egi-et simple, capillary 
acines hairy. 
Bac"charis. Calyx imbricate, cylindric; 
scales ovate, sub-coriaceous ; fertile florets 
mixed with the perfect ; receptarcle naked 
egret hairy, (groundsel-tree.) 
Pterocau'i.on. Involucre imbricate, 
with close- pressed, downy, sub-scarious 
scales ; receptacle naked ; periect and pis- 
tillate florets intermixed, the pistillate cnea 
slender, border 3-toothed, perfect ones with 
a 5-clefl border ; egret hairy, scabrous 
akenes angled, hairy. S. 
B. Floirers radiate ; the ligvlnte ray -florets 
very manifest. {Receptacle naked.\ 
Eri'geron. Calyx imbricate, sub-hemi- 
spherical ; florets of the ray very numerous 
and naiTow ; egret double, outer minute, 
inner hairy, of few rays. 
Inu'la. Calyx imbricate, generally squar 
rose ; egret simple, scabrous, sometimes a 
minute, exterior, chaffy one ; anthers ending 
in 2 bristles at the base ; ray-florets numer- 
ous, always yellow, (elecampane.) 
As"ter. Calyx imbricate, the inferior 
scales generally spreading; egi-et siinple 
pilo.se ; receptacle often deep-pitted ; lioi ets 
of the ray more than 10, except in a few 
species ; color purple or white, never yel- 
low, (star-flower.) 
Solida'go. Calyx oblong or sub cylin- 
dric, with oblong, narrow, pointed, straight 
scales, imbricate, closed upon the flower ; 
ray-florets about 5, and fewer than 10, lan- 
ceolate, 2-toothed, equal to, or shorter than 
the calyx ; fllaments capillaiy, veiy short ; 
style thread-form, equalling the length of the 
stamens ; stigma-cleft, spreading ; egret sim- 
ple, pilose, scabrous ; receptacle furrowed 
with 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, sessile ; some- 
times polygamous, (colt's-foot.) 
Chrysan"themum. Calyx hemispheri- 
cal, imbricate, with the scales membranous 
at the margin ; egret none, or a narrow mar- 
gin, (ox-eyed daisy, fever-few.) 
Bei/'lfs. 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 ; egret 5 erect awns, (mary 
gold.) Ex. 
Matrica'ria. Involucre flat, imbricate, 
with scales having scarious margins; recep- 
tacle nake<i, terete ; egi-et none. Ex. 
Tri'co'phyl"lum. Involucre oblong-cyl- 
inuric, many-leaved, equal ; ray-florets ob- 
long ; receptacle naked ; egret chaffy, mi- 
nute, 5 to 8-Ieaved ; leafets obtuse, awnless. 
S.- 
Pec''tis. Involucrum 5-leaved; ray -flo- 
rets 5 ; receptacle naked ; egret 3-5 awns. 
Arni'ca. Calyx hemispherical, leafets 
equal, longer than the disk , receptacfe n& 
