GUIDE TO PLANT FAMILIES xxvii 



2. DICOTYLEDONES 



Stems have bark, wood, and pith. 

 Leaves are net-veined. 

 Parts of flowers in fours or fives. 

 Embryo has two or more cotyledons. 



{A) Fruit a Berry 



Page of 

 I. Calyx persistent. Families and 



Species 



{n) Berry crowned with shriveled remains of calyx. 



GllOSSULARIACEJi . . XXXvi 



(ft) Calyx teeth or top of tube crowning summit of 

 fruit. Vaccinium, Oxycoccus, 



and Chiogenes in [ ^^^' ^^" 



Vacciniace^ . . 



Fruit in clusters on stems from the axils 

 of the leaves. Symphoricarpos and 



Lonicera in 

 Caprifoliace^ . . 



- xliii 



(c) Calyx persistent at base of fruit and sometimes 

 inclosing it. 



Plumlike fruit containing 4 to 8 hard seeds. 

 Calyx thickened. 



Ebenace^ .... xlii 



Many seeds arranged around an axial pla- 

 centa, w^hich sometimes extends far into 

 the cells. Solanace^ .... xlii 



Racemes. Berry 5- to 16-celled, one seed in 

 each. Phytolaccace^ . . xxxiv 



II. Calyx absent, 

 (a) Several-seeded. 



