374 EXOGENOUS OR DICOTYLEDONOUS PLANTS. 



twice as many as the sepals, distinct, inserted into the receptacle or base 

 of the calyx. Embryo large: albumen little or none. Flowers mostly 

 dioecious or polygamous. 



Leaves dotted. Ovaries or cells 2-ovuIed. ZANTHOXYLACE^E, p. 401. 



Leaves dotless. Ovule solitary. 



Ovaries 4 or 5, distinct in fruit. OCHNACE^E, p. 402. 



Ovary one : ovule on a long ascending funiculus. ANACARDIACE^E, p. 403. 



Group 12. Ovary compound, 2-3-lobed, 2-3-celled, free from the calyx, 

 which is imbricated in aestivation. Petals often irregular, or one fewer 

 than the sepals, or sometimes wanting. Stamens definite, distinct, in- 

 serted on or around a hypogynous disk. Ovules 1 or 2 in each cell. 

 Embryo curved or coiled. Albumen none. Flowers often polygamous. 

 Leaves opposite. 



Entire. Gynaecium trimerous. MALPIGHIACEJE, p. 404. 



Lobed, or compound. Gyna?cium dimerous. ACERACEJE, p. 404. 



Leaves chiefly alternate. Gynaecium trimerous. SAPINDACE.S:, p. 405. 



Group 13. Ovary compound, 2-5-celled. Calyx free from, or adherent to 



the base of, the ovary. Petals and stamens equal in number to the lobes 



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



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



' mostly large. Shrubs or trees. Flowers regular. 



* Stamens alternate with the petals. 



Ovaries partly separated. Leaves compound. STAPHYLEACEJE, p. 407. 



Ovaries wholly united. Seed arillate. Leaves simple. CELASTRACE.E, p. 406. 



* * Stamens opposite the petals ! 



Sepals valvate in estivation. Cells 1-ovuled. RHAMNACE.E, p. 406. 



Petals valvate, caducous. Cells 2-ovuled. VITACE^E, p. 407. 



Group 14. Ovary compound, 2-celled, free from the calyx. Sepals and pet- 

 als very irregular. Stamens monadelphous ; the tube of filaments split on 

 one side, and more or less united with the claws of the hypogynous pet- 

 als : the anthers one-celled, and opening by a pore at the apex ! Seeds 

 albuminous. Embryo large. POLYGALACE^E, p. 408. 



Group 15. Ovary simple and solitary, free from the calyx; the fruit a pod. 

 Flower 5-merous, the odd sepal anterior. Corolla papilionaceous, irregu- 

 lar, or sometimes regular. Stamens monadelphous, diadelphous, or dis- 

 tinct, mostly perigynous. Seeds destitute of albumen. 



Stamens hypogynous. Stipules none. KRAMERIACE^, p. 409. 



Stamens mostly perigynous. Fruit a legume. L.EGUMINOS^:, p. 409. 



Group 16. Ovaries one or several, simple and distinct, or combined into a 

 compound ovary with two or more cells and the placentae in the axis. 

 Petals and the distinct stamens perigynous. Seeds destitute of albumen. 



* Calyx free, although often inclosing the ovaries in its tube, except when the 

 latter are united, when it is adnate to the compound ovary, and the sta- 

 mens are indefinite. 



