878 
SYNGENESIA. 
ARCTIUM. {Cal. globose ; scales spinous, bent inwards, and 
hooked. E.) 
CART)UUS. (Cal. tiled, with spinous scales, tumid: Recept. 
hairy : Down deciduous, hair-like. E.) 
ONOPOR'DON. Cal. with spreading, spinous scales, tumid : 
Recept . cellular, somewhat chafly. 
SERRAT'ULA. Cal. nearly cylindrical, tiled; scales rather 
acute, but not spinous : ( Down permanent. E.) 
[Centaurea nigra.] 
(3) Florets all tubular. 
EUPATO'RIUM. Recept. naked: Down feathery : Cal. tiled : 
Style cloven, prominent. 
(CHRYSO'COMA. Recept. naked : Down simple, rough : Cal. 
hemispherical, tiled: Style scarcely longer than the 
florets. E.) 
SANTOLFNA. Recept. chaffy: Down none: Cal. tiled, hemis¬ 
pherical. 
BPDENS. ( Recept . chafly : Down awnlike, rough with re¬ 
versed prickles : Cal. tiled with channelled scales. E.) 
QSenecio vulgaris. Tanacetum vulgare. Tussilago Petasites. Aster 
Tripolium.] 
SUPERFLUA. 
(1) Florets all tubular. 
ARTEMISIA. Recept. almost naked: Down none: (Cal. 
tiled; scales converging : E.) Florets of the circum¬ 
ference without a petal. 
TANACETUM. Recept. naked: ( Seed with a membranous 
crown: Florets of the circumference trifid, sometimes 
wanting. E.) 
CONY'ZA. (Recept. naked : Down hair-like, rough : Florets 
of the circumference trifid : Cal. tiled. E.) 
GNAPHA'LUM. Recept . naked : Down feathery or hair-like : 
Cal. tiled with membranous coloured scales: (Florets 
of the circumference awl-shaped. E.) 
[Senecio vulgaris. Tussilago Petasites, hybrida. Aster Tripolium. 
Erigeron. Bidens.] 
