GUIDE TO PLANT FAMILIES 



XXVll 



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 



I. Calyx persistent. 



(rt) Berry crowned with shriveled remains of calyx. 



Grossulariace^ . 



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

 fruit. Vaccinium, Oxycoccus, 



and Chiogenes in 



VACCINIACEiE . . . 



Fruit in clusters on stems from the axils 1 

 of the leaves. Symphoricarpos and j 



Lonicera in 

 Caprifoliace^ . . 



(c) Calyx persistent at base of fruit and sometimes 

 inclosing it. 



Plumlike fruit containing 4 to 8 hard seeds. 

 Calyx thickened. 



Ebenaceje .... 



Many seeds arranged around an axial pla- 

 centa, which sometimes extends far into 

 the cells. Solanace^ .... 



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



each. PHYTOLACCACEiE . . 



Page of 



Families and 



Species 



xli, xlii 



- xliii 



xlii 



xlii 



II. Calyx absent. 

 (a) Several-seeded. 



