5 00 CLA SSIFICA TION. 



bush huckleberry, eastern United States), the mountain cran- 

 berry (Vitis-Idaea vitisidaea=Vaccinium vitisidaea) in the north- 

 ern hemisphere; the bilberries and blueberries (of genus Vacci- 

 nium) ; the cranberries (examples : the large American cranberry, 

 Oxycoccus macrocarpus and the European cranberry, Oxycoc- 

 cus oxycoccus, in cold bogs of northern North America, the 

 latter also in Europe and Asia). 



976. Order Primulales. Two families here. The primrose 

 family (Primulaceae) contains the loosestrifes (Steironema), star- 

 flower (Trientalis), etc. 



977. Order Ebenales. Of the four families, the ebony fam- 

 ily (Ebenaceae) contains the well-known persimmon (Diospyros 

 virginiana) and the storax family (Styracaceae) with the silver- 

 bell, or snowdrop tree (Mohrodendron carolinum). 



978. Order Gentianales. Herbs, shrubs, vines, or trees. 

 Six families in the United States. 



The olive family (Oleaceae) includes the common lilac (Syrin- 

 ga), the ash trees (Fraxinus), the privet (Ligustrum). 



The gentian family (Gentianaceae) among other genera in- 

 cludes the gentians (Gentiana). 



The milkweed family (Asclepiadaceae) contains plants mostly 

 with a milky juice. Asclepias with many species is one of the 

 most prominent genera. 



979. Order Polemoniales. Mostly herbs, rarely shrubs and 

 trees. Fifteen families in the eastern United States. 



The morning-glory family (Convolvulaceae) includes the 

 bindweeds (Convolvulus), the morning-glory (Ipomaea), etc. 



The dodder family (Cuscutaceae) includes the dodders, or 

 "love- vines." There are nearly thirty species in the United 

 States. The stems are slender and twine around other plants 

 upon which they are parasitic (see paragraph 179). 



The phlox family (Polemoniaceae). The most prominent 

 genus is Phlox. Over forty species occur in North America. 



The borage family (Boraginaceas) includes the heliotrope 

 (Heliotropium), the hound's-tongue (Cynoglossum), the forget- 

 me-not (Myosotis), and others. 



