OUTLINE OF TWENTY LESSONS. 299 



Pyrulacece ; pyrola family, pyrola, Indian -pipe, etc. 

 Ericacece ; heath family. (Also rhododendron and whortle- 

 berry families.) 

 Primulinje : One-celled ovary, seeds on a central column, 

 corolla salver-form. 

 Primulacece : primrose family. 



2. Flowers tetracyclic, that is, the parts in four whorls. 

 Tubiflor^e : Gamopetalous corolla not split, the five parts in- 

 dicated by a slight unevenness of the margin, corolla twisted 

 in bud. 

 Convolvulacece ; bindweed family, morning-glory, dodder, 

 etc. 

 Personate : Flowers frequently bilabiate (the nightshade 



family represents this group). 

 Nuculifer^; : Calyx gamosepalous ; gamopetalous corolla usu- 

 ally bilabiate, carpels usually two, forming four nutlets. 

 Boraginaceee ; borage family, forget-me-not, etc. 

 Labiatce ; mint family, dead-nettle, catnip, etc. 

 Contortte : The corolla is twisted in the bud, but is split into 

 five lobes. 

 Genlianacece ; gentian family. 

 Rubiales : Leaves opposite with stipules, or vetticillate. 

 Rubiacece , madder family, bluet. 

 Caprifoliacece ; honeysuckle family, lonicera, etc. 

 Dipsacales : Flowers in a head (in one family), no stipules, 

 anthers distinct. 

 Valerianacece ; valerian family. 

 Dipsacacea ; teasel family. 

 Campanulin^e : Flowers not in heads, anthers united. 



Campanulacece ; bellflower family. 

 Composite : Flowers in heads, anthers united. 



Composite: ; composite family, aster, solidago, sunflower, 

 dandelion, etc. 



