THALAMIFLOE^. 



509 



Stamens distinct, or nearly so. 

 Leaves dotted. Seeds amygdaloid 

 Leaves without dots. Seeds minute 

 Carpels less than 4. 



Seeds comose 



Seeds not comose. 

 Ovules pendulous. Petals twisted 

 in aestivation .... 

 Ovules ascending, or horizontal. 

 Petals imbricated in festivation . 

 Ovules pendulous. Petals imbri- 

 cated in aestivation 

 Calyx valvate, or but very slightly imbri- 

 cated. 

 Anthers opening by pores 

 Anthers with longitudinal dehiscence. 

 Calyx generally enlarging with the 



fruit 



Calyx small, not enlai'ging with the 



fruit 



Stamens more or less perigynous. 

 Flowers in-egiilar. Ovules pendulous 

 Flowers regular. Ovules erect. 



AurantiacecB. 50. 

 BrexiacecE. 54. 



Tamaricacece. 24. 



CaneUacece. 53. 

 Pittosporacece. 52. 

 Cyrillacece. 57. 



. Tremandracece. 43. 



Olacacece. 55. 



Icacinacece. 56. 



Tropceolacece. 69. 

 Limnanthacece. 70. 



B. Leaves with stipules. 



a. Catfels distinct or solitary. 



Anthers with recurved valves. Carpel 



solitary Berheridaceoe. 8. 



Carpels several Coriariacece. 62. 



b. Carpels wholly combined, (at least as to the 



ovaries), with more placentas than one. 

 Placentas parietal. 

 Leaves with circinate vernation . . Droseracece. 22. 

 Leaves with involute vernation. Anthers 



crested, and turned inwards . . . Violacece. 20.. 

 Stamens opposite to the petals. Anthers 

 naked, and turned outwards . . . Sauvagesiacece. 21 , 

 Placentas axile. 

 Stjies distinct to the base. 

 Calyx much imbricated, in an irregular 

 broken whorl. 

 Petals small, sessile .... Elatinacece. 25. 

 Calyx but little imbricated, in a com- 

 plete whorl. 

 Petals conspicuous, stalked . . Malpighiacece. 46. 



Calyx valvate Tiliacece. 31 . 



Styles more or less combined. Fruit gy- 

 nobasic. 



Gynobase fleshy Ochnacece. 61. 



Gynobase dry. 

 Leaves regularly opposite . . . Zygophyllaceoe. 64. 

 Leaves more or less alternate. 



Fruit beaked Geraniacece. 68. 



Frait not beaked .... Oxalidacece. 66. 

 Styles more or less combined. Fruit not 

 gynobasic. 

 Calyx much imbricated, in an irregular 

 broken whorl. 

 Flowei-s surrounded by an involucre . Chlcenacece. 33. 

 Flowers not surrounded by an invo- 

 lucre Sapindacece. 40. 



Calyx but little imbricated, in a com- 

 plete whorl. 



