538 KEY TO THE FAMILIES. 



Ovary one and inferior or united with the calyx 



Ovary one celled Nyssa in Dogwood, Mistletoe 



and Sandalwood 372, 144, 145 

 Ovary 2 or more celled Fothergilla in Witch-hazel 



and Birthwort 230, 149 

 Petals present and not united 

 Stamens not borne on the calyx 



Stamens more than twice as many as the petals 



Leaves opposite St. John's- wort 339 



Leaves alternate 

 Ovaries more than one, each one celled 



Trees and shrubs Magnolia and Custard Apple 164, 169 

 Herbs . . Crowfoot and Water Lily 171, 162 



Ovary solitary, i celled 



Insectivorous plants . . . Sundew 208 



Plants not insectivorous 

 Sepals deciduous 



Leaves simple Purslane and Poppy 157, 194 



Leaves compound Caper and Crowfoot 205, 171 

 Ovary solitary, 2 or more celled 

 Stamens connected with the base of the petals 

 Stamens united around the pistil into a column 



Mallow 335 



