XC1V NATURAL ARRANGEMENT. 



GROUP 11. Ovary compound, 2- 5-celled. Calyx, free, or adherent 

 to the base of the ovary. Petals and stamens as many as the lobes 

 of the calyx, and inserted either into its throat or base, or upon the 

 disk that covers it. Seeds solitary, or few in each cell, albuminous. 

 Flowers regular. 



f Stamens alternate with the petals. 



Ovaries partly separated : leaves compound. TEIBE STAPHYLEAE. p. 48. 

 Ovaries wholly united. Seeds ariUate : leaves simple. CELASTRACEAE. p. 47. 



f f Stamens opposite the petals. 



Sepals valvate. Cells l-ovuled. RHAMNACEAE.JJ. 49. 



Petals valvate, caducous. Cells 2-ovuled. YITACEAE. p. 49. 



GROUP 12. Ovary compound, 2-celled, free from the calyx. Sepals 



and petals very irregular. Stamens monadelphous, the tube of 



filaments split on one side, and more or less united with the claws 



of the hypogynous petals ; anthers 1-celled, opening by a pore at 



apex. 



Seeds albuminous ; embryo large. POLYOAL.ACEAE. p. 51. 



GROUP 13. Ovary simple and solitary, free from the calyx; fruit a 

 pod. Flower 5-merous, the odd sepal anterior. Corolla mostly 

 irregular and papilionaceous, sometimes regular. Stamens mona- 

 delphous, diadelphous, or distinct, mostly perigynous. Seeds desti- 

 tute of albumen. LEGUMINOSAE. p. 53. 



GROUP 14. Ovaries 1 or several, simple and distinct, or combined 

 into a -compound ovary with 2 or more cells and the placentae in 

 the axis. Petals, and distinct stamens, perigynous. Seeds destitute 

 of albumen. 



f Calyx free, inclosing the ovaries in its tube, or when the ovaries arc united, adnate 

 to them, and the stamens indefinite. 



Leaves alternate, stipulate. ROSACEAE. p. 70. 



Leaves mostly opposite, without stipules. 



ft Calyx free from the compound ovary. Stam. definite. LYTHRACEAE. p. 86. 



f f f Calyx-tube adnate to the compound ovary. Stamens definite. 



Anthers opening by a pore at apex. MELASTOMACEAE.JJ. 86. 



Anthers opening longitudinally. ONAGRACEAE. jp. 87. 



GROUP 15. Ovary compound, 1-celled, with parietal placentae. 

 Petals and stamens mostly inserted on the throat of the calyx. 

 Flowers mostly perfect. 



Calyx adherent to the ovary. Stamens 5. GROSSULACEAE.JJ. 90. 



GROUP 16. Ovary compound, 2- to several-celled (or 1-celled by 

 obliteration) ; placentae parietal, arising from the axis, but carried 

 outward to the walls of the pericarp. Calyx adnate. Corolla often 

 gamopetalous ! Stamens united either by their filaments or anthers. 

 Flowers mostly monoicous. Seeds without albumen. CUCURBIT- 



ACEAE. p. 91. 



GROUP 17. Ovaries 2 or more, many-ovuled, distinct, or partly, 

 and sometimes completely, united, when the ovary is 1-celled with 

 parietal placentae, or 2- to many-celled with the placentae in the 



