DICOTYLEDONES— THALAMIFLOR^ 



303 



Calyx slightly imbricate, in a complete 

 whorl. 

 Carpels i or more. 



Ovary 1-celled, with a free central 

 placenta ..... 

 Carpels less than 4. 



Seeds comose ..... 

 Seeds not comose. 



Ovules pendulous. Petals twisted 

 in aestivation .... 

 Ovules ascending or horizontal. 

 Petals imbricate in aestivation 

 Calyx valvate, or but very slightly im- 

 bricate. 

 Anthers opening bj' pores 



B. Leaves icith stijjides. 



a. Carpels distinct, or solitary. 



Anthers with recurved valves. Carpel solitary 



b. Carpels wholly combined {at least as to the 



ovaries), with more placentas than one. 

 Placentas parietal. 



Leaves with involute vernation. Anthers 



crested, and turned inwards . 

 Stamens opposite to the petals. Anthers 

 naked, and turned outwards . 

 Placentas in the axis. 



Styles distinct to the base. 



Calyx imbricate, in an irregular broken 

 whorl. 

 Petals small, sessile .... 



Calyx slightly imbricate, in a complete 

 whorl. 

 Petals minute ...... 



Calyx valvate ...... 



Styles more or less combined. 



Calyx imbricate, in an irregular broken 

 whorl. 

 Flowers surrounded by an involucre 

 Calyx slightly imbricate, in a complete 

 whorl. 

 Sepal sjiurred ...... 



Calyx valvate. 



Stamens united by their filtiments into a 

 column ...... 



Stamens not united into a column . 



Portulacacece. 



Tamaricacecp. 



Canellacece. 



Pittosporacece. 



Tremandracece. 



Berheridacece. 



ViolacecF. 



Sa uvages ia cecB. 



Elatinacece. 



ParonychiacecB . 



Tiliacece. 



Chlcenacece. 



Vochysiacecp. 



Stercnliacece. 

 Tiliacece. 



In order to prevent the student being misled, and thus referring plants 

 to their wrong positions in the Vegetable Kingdom, it should be particularly 

 noticed, that although the general character of the Thalaniiflorfe is to have 

 dichlamydeous flowers and polypetalous corollas, yet excej)tions do occur 



