XVI KEY TO THE ORDERS. 



CARYOPHYLLACE^E. Styles 2-5. Ovules in the centre or 

 bottom of the cell. Stem usually swollen at the 

 joints. Leaves opposite 32 



LINAGES. Stamens 5, united below. Pod 10-celled, 10- 



seeded 40 



GERANIACE.E. Ovaries or lobes of the ovary 5 or 3, with 

 a common central style or axis which remains 

 after the ripe ovaries separate from it 41 



OXALIDACE^E. Stamens 10. Pod 5-celled. Styles 5, dis- 

 tinct. Leaflets 3, obcordate, drooping at night-fall. 42 



ERICACEAE. Anthers opening by pores at the top, or across 

 the top. Leaves mostly evergreen, sometimes 

 brown beneath ; but in some instances the plant 

 is white or tawny 137 



RTJTACE^E. Shrubs, with polygamous flowers and leaves 

 of 3 leaflets, dotted with transparent glands. 

 Stigmas 2. Fruit a 2-seeded samara winged all 

 round 43 



(b) Stamens perigynous (plainly attached to the calyx). 



SAXIFRAGACE.E. Leaves opposite or alternate, without 

 stipules. Styles or stigmas 2 ; in one instance 4. 

 Carpels fewer than the petals 75 



CRASSULACE^E. Flowers symmetrical. Stamens 10 or 8. 



Leaves sometimes fleshy 78 



LYTHRACEjE. Stamens 10, in two sets. Calyx enclosing, 

 but really free from, the ovary. Leaves mostly 

 whorled 84 



(c) Stamens attached to a fleshy disk in the bottom of the calyx-tube. 



ANACARDIACE^E. Trees, or shrubs, not prickly. Leaves 



compound. Stigmas 3. Fruit a 1 -seeded drupelet. 43 



CELASTRACEJE. Twining shrub. Leaves simple. Pods 



orange when ripe 46 



SAPINDACE.E. Shrubs, or trees. Fruit 2-winged, and leaves 

 palmately-veined. Or, Fruit an inflated 3-celled 

 pod, and leaves of 3 leaflets. Styles 2 or 3 47 



(d) Stamens attached to the petals at their very base. 

 Claytonia, in 



PORTITLACACE^E. Sepals 2. Leaves fleshy. Style 3-cleft. "37 

 AQUIFOLIACE.E. Shrubs, with small axillary flowers, hav- 

 ing the parts in fours and sixes. Fruit a red berry- 

 like drupe. Stigma sessile. Calyx minute 145 



