FLOWERS POLYPETALOUS. 



269 



bryo incurved, enclosing a farinaceous albumen. 

 Claytonia and Portulaca are examples. 



5. Ficoideos. — Petals attached to the summit of the 

 calyx. Stamens numerous. Germen simple, sur- 

 mounted by several styles. Cells of the capsule or 

 berry numerous, polyspermous. Seeds attached to 

 the interior angle of the cells. Embryo placed 

 around a farinaceous albumen. Sesuvium and Me 

 sembryanthemum are examples. 



6. Onagrce. — Petals usually four, attached to the sum- 

 mit of the calyx. Stamens determinate. Germen 

 inferior. Capsule or berry polyspermous. Embryo 

 straight without albumen. This order embraces a 

 number of ornamental plants, among which are 

 Epilobium, Oenothera and Gaura. 



7. Myrti. — Calyx urceolate or tubular. Petals deter- 

 minate, alternating with the segments of the calyx. 

 Stamens indeterminate. Embryo straight without 

 albumen. Leaves simple and dotted like those of 

 the Orange. Myrtus, Caryophyllus and Philadelphia 

 are examples. 



8. Melasto?nce. — Petals inserted into the summit of the 

 calyx, and alternating with its segments. Stamens 

 determinate and double the number of petals. Fila- 

 ments bisetos, anthers beaked. Germen superior, 

 enelosed by the urceolate or tubular calyx. Embryo 

 incurved without albumen. Leaves opposite, sim- 

 ple and nerved. Rhexia is an American example. 



9. Salicarim. — Petals inserted into the middle of the 

 calyx. Stamens determinate. Germen simple superi- 

 or. Capsule enclosed by the calyx polyspermous, 

 seeds attached to the central receptacle. Embryo 

 straight without albumen. Lythrum and hnardia 



are American genera. 



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