SYNGEN’ESlA 
143 
N° of 
N° Genera* Growth, species.. Native of 
Receptacle rather naked. 
Species in 
Britain. 
84 Gorteria 
s Sc h 
]2 Africa 
85 Sclerocarptts 
1 Africa . 
Receptacle bristly. 
86 Centaurea* 
h 
67 Alps, Asia 
87 Zaegsea 
2 Cape 
Receptacle chaffy. 
88 Coreopsis 
h 
12 Virginia, Sec. 
89 Helianthus 
h 
13 India, America 
90 Osmites 
■ s 
4 Cape 
91 Rudbeckia 
h 
6 Canada, Carolina 
Brit. J 
ORDER IV. POLYGAMIA NECESSARIA. 
(NECESSARY fOLYGAMY.) 
Having the florets of the disc male, and those of the radius female-} 
hence called necessary . 
02 Baltimora 
93 Calendula 
94 Filago 
93 Hippia 
96 Micropus 
97 Milleria 
98 Osteospennum 
99 Othonna 
Receptacle naked. 
h 1 
s & h 9 
li 7 
s Sc h 3 
h 2 
h 2 
h 13 
s Sc h 26 
Maryland 
France, Sec. 
France, Germany 
America 
Spain 
Panama 
Africa, America 
Africa, France 
BRt. 3 
* In centaurea the scales of the calyx, and the' feathers of the seeds, differ in 
different species; and the florets of the radius differing from those of the disc as to 
sex and size, apparently brings it under the description of a radiate flower ; but as 
the florets are all tubular, Linnaeus hath not called it radiate , but tulmloas ; of dif¬ 
ferent forms.—The flowers of centaurea cyanus (blue-bottle) make a good blue, 
which, with 1 the addition of a little alum, becomes permanent. 
