NATURAL ORDERS. xiii 



(3) Corolla hypogyiiotis, bearing the stamens. 



* Placenta free central. 



XLVI. PrimulacEjE (figs. 649-63). Stamens isomerous and 

 opposite the corolla-lobes. 



XLVI I. Lentibulace/E (figs. 664-9). Corolla very irregular. 

 Stamens fewer than the lobes, and alternate with them. 



** Placentas parietal, or in the axial angle of the cells, 

 [a] Corolla regular, or nearly so. 



XLVIII. OleacE/E (figs. 670-1). Trees or shrubs. Stamens 

 2, alternating with the 2 ovary-cells, and having no constant rela- 

 tion to the corolla-lobes. 



XLIX. APOCVNACEiE (tigs. 672-3). Corolla contorted. Stamens 

 isomerous. Ovary of 2 carpels, usually distinct, whilst the styles 

 are united at the top. 



L. GENTnN'A(JE/« (figs. 674-84). Bitter plants. Corolla con- 

 torted. Stamens isomerous. Placentas parietal, rarely meeting 

 in the axis. 



LI. PolemoniacEjE (fig. 685). Corolla contorted. Stamens 

 isomerous. Ovary 3-celled, with sevei'al seeds. 



LIL ConvolvulacEjE (figs. 686-91). Corolla plaited. Stamens 

 isomerous. Ovary 2- or 3-celled, with 2 (rarely i) ovules in each, 

 often separated by an additional false partition. 



LIIL Boragine^ (figs. 692-712). Stamens isomerous. Ovary 

 2- or 4-lobed, with one ovule in each lobe. 



LIV. SOLANACE* (figs. 713-7)- Stamens isomerous. Corolla 

 plaited or imbricate. Ovary 2-celled, with several -ovules in each 

 cell. 



ib) Corolla irregular. Stamens i less or 3 less than 

 the lobes. 



LV. OrobanchacE/E (figs. 718-25). Leafless parasites. 

 Placentas parietal, or rarely meeting in the axis. 



LVL SCROPHULARINE^E (figs. 726-76). Ovary 2-celled, with 

 several ovules in each cell. 



LVIL Labiate (figs. 777-821). Ovary 4-lobed, with I ovule 

 in each lobe. 



LVin. Verbenace^ (fig. 822). Ovary entire, 2- or 4-celled, 

 with I ovule in each cell. 



* * * Anomalous families. 



LIX. PlumbaginEvE (figs. 823-7). Ovary with i eel! and 

 ovule, but several styles. 



