AND ORDERS. 359 



*** Ovary inferior ; (stamens epigynous) . 



11. Uinbelliferous plants — herbs ; fruit dry, of two carpels, se- 



parating from the axis. 



12. AraUaceous plants — shrubs ; fruit succulent, of more than 



two carpels, not separating. 



Monopetals : Dichlamydeous plants, with the petals united 

 (from the base more or less upwards) into a single piece; 

 Orders 13 to 18. 



* Stamens epigynous ; (ovary inferior). 

 t Stamens attached to the corolla, separate. 



13. Dipsacaceous plants — herbs; flowers in compact heads or 



spikes ; calyx surrounded by an involucre ; stamens equal- 

 ling in number the divisions of the corolla, the anthers free. 



ft Stamens attached to the corolla, cohering hy their anthers. 



14. Composite plants—herbs ; florets in heads ; stamens equalling 



in number the divisions of the corolla, ^he anthers united 

 into a ring around the style. 



** Stamens hypogynous. 



15. Ericaceous plants— shrubs ; stamens as many or twice as 



many as the corolla lobes ; anthers opening by two pores. 



** Stamens perigynous. 

 t Seeds attached to a free central placenta. 



16. Primulaceous plants — herbs ; stamens attached to the tube 



of the corolla, isomerous, opposite its lobes. 



-J-f Seeds attached to a parietal placenta. 

 X Corolla regular. 



17. Gentianaceous plants — herbs ; stamens attached to the 



tube of the corolla, isomerous, alternating with its lobes. 



