330 



MANUAL OF BOTANY 



Gynobase dry. 

 Leaves regularly opposite Zygophyllace(B, 



Leaves more or less alternate. 



Fruit beaked Geraniacece. 



Fruit not beaked . OxalidaceiB. 



Styles more or less combined, not gyno- 

 basic. 

 Calyx much imbricate, in an irregular 

 broken whorl. 

 Flowers not surrounded by an involucre Sapindacees. 

 Calyx but little imbricate, in a complete 

 whorl. 

 Stamens 3, sepals and petals penta- 



merous . . Hippo c ra i eacem. 



Stamens more than 3. 

 Calyx glandular. 



Petals without appendages Malpigkiacets. 



Calyx not glandular. 

 Leaves simple. 

 Petals united by their claws into 



a tube . Stackhousiaceee. 



Leaves compound. 

 Petals distinct . Siaphyleacece. 



Calyx valvate. 



Stamens opposite to the petals, iso- 

 mer ous. 

 Seeds one in each cell . . Mhamnaeece. 



Stamens opposite to the petals if iso- 

 merous, anthers versatile, seeds two 

 in each cell . . . Vitacea. 



Stamens twice as many as the petals Burseracece. 



The following exceptions may be noted to the characters usually dis- 

 tinctive of the Discifloree. We have apetalous species in ZygophyllaceiB, 

 GeraniacecB, Balsaminace^, Butacece, Sirnaruhacees, Burseracea, 

 Olacacece^ Celastracecs^ Bhamnacece, SapindacetSj Anacardiacea, and 

 some others. 



Gamopetalous corollas are sometimes found in Sumiriacea, ButacecBj 

 BalsaminacecB, Meliacees, and Stackhousiaceee. 



In Geraniaceo', Balsaminacece, Trop^olacece, OxalidacetB, Aceracece^ 

 Anacardiacece, Malpighiaeece^ Linaceie, &c., the disc is small, or entirely 

 or partially absent. The ovary is more or less inferior in some Olacacets 

 and RJiam^iacece ; and the placentation is parietal instead of axile in some 

 OclnjacGce and Moringace(B. 



