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 



(a) Berry crowned with shriveled remains of calyx. 



GROSSULAKIACE^E . . xxxvi 



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

 fruit. Vaccinium,Oxycoccus, 



and Chiogenes in xli ' xlii 



VACCINIACE.E . . 



Fruit in clusters on sterns from the axils" 

 of the leaves. Symphoricarpos and 

 Lonicera in 

 CAPRIFOLIACE.E . . 



(c) Calyx persistent at base of fruit and sometimes 

 inclosing it. 



Plumlike fruit containing 4 to 8 hard seeds. 

 Calyx thickened. 



EBENACE.E .... xlii 



Many seeds arranged around an axial pla- 

 centa, which sometimes extends far into 

 the cells. SOLANACE^E .... xlii 



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

 each. PHYTOLACCACE^E . . xxxiv 



II. Calyx absent, 

 (a) Several-seeded. 



