SYNGENTESIA. 351 



and calyx. These Gasrtner has illustrated with the 

 greatest accuracy and skill, but even these must not 

 be blindly followed to the destruction of natural gen- 

 era. 



4. Polygamia necessaria. Florets of the disk furnished 

 with stamens only, those of the margin, or radius, 

 only with pistils ; so that both aie necessary to each 

 other. This is .well seen in the common Garden Ma- 

 rigold, Calendula^ in whose calyx, when ripening seed, 

 the naked and barren disk is conspicuous. Othonna^ 

 Curt. Mag. t, 306, 768, Arctotis^ Osteospermiim and 

 Silphium^ not rare in gardens, are further examples of 

 this Order, which I believe is constant and founded 

 in nature. We have no British specimens either of it 

 or the fellovving. Filago^ at least as far as our Flora 

 is concerned, belongs to Gnaphalium. See . Engl. 

 Bot. t. 946, 1193, &:c. 



5. Polygamia segregata. Several flowers, either simple 

 or compound, but with united tubular anthers, and 

 with a partial calyx, all included in one general calyx. 

 Of these the Globe-thistle, Echinops, and Stoebe^ with 

 Serlphium cxnd Corymbiumy (which two last require to 

 be removed hither from the abolished Linnjean Order 

 Syngenesia Mojiogamia,) have only 1 floret in each 

 partial calyx ; Jungia has 3, Elephanfopits 4, others 

 more. In every case the partial calyx is distinguished 

 from the chaffy seed-crown observable in several gen- 

 era of the other Orders, (though the latter is indeed 

 analogous to a calyx,) either by being inferior, or by 

 the presence of a seed- crown, or feathery down, be- 



