ARTIFICIAL KEY TO THE FAMILIES. 65 



Style solitary. 

 Flowers in incurved racemes, generally blue. 



Ovary four-lobed Borage family (most), 233 



Ovary one-celled (garden annuals) Phacelia, &c., 273 



Flowers not in incurved racemes. 

 Trees or shrubs. 



Petals combined Heath family (some), 127 



Petals free Buckthorn family, 207 



Herbaceous plants. 

 Petals bearded or fiinged upon the insiie....Gentian family, 213 

 Petals not bearded. 



a. Stigmas three-cleft Phlox family, 271 



6. Stigmas 5 ; carpels 5 Geraniuvi family, 99 



c. Stigmas 1 or 2. 



Stamens opposite the lobes of the 



corolla Primrose family, 263 



Stamens alternate with the lobes of 

 the corolla. 

 Leaves alternate. 

 Stamens covered with long hairs. If M^Zein, 256 

 Stamens not hairy. 

 Calyx usually very unequal . . Convolvulus family, 229 

 Calyx regular, or nearly so. 

 Ovary four - lobed ; lobes 



one-seeded Borage family, 233 



Ovary many-seeded Potato family, 221 



Leaves opposite. 

 Stigma shaped like an hour- 

 glass Periwinkle family, 210 



Stigma simple Gentian family, 213 



Flowers regular, simple, pentamerous, and tvith one, two, three, four, 

 six, seven, eight, or nine stamens. 



Stamens 1 to 3 Valerian family , 316 



Stamens 2 (or casually 3) .Jessamine family, 233 



Stamens 4. 



Plant aromatic Mint, 241 



Plant scentless Scabious family, 320 



Stamens 6, 7, or 8. 



Trees (stamens 8) Maple family, 158 



Herbaceous plants. 



Flowers bright golden yellow Agrimony, 196 



Flowers red, white, or green (no corolla) Persicarias, 135 



