500 CLA SSIFICA TION. 



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

 berry (Vitis-Ida;a vitisidaea =\'accinium vitisid;ea) in the north- 

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

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

 Oxycoccus macrocarpus and the European cranberry, Oxycoc- 

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

 latter also in Europe and Asia). 



976. Order Primulales. — Two families here. The primrose 

 family (Primulacex') contains the loosestrifes (Steironema), star- 

 flower (Trientalis), etc. 



977. Order Ebenales. — Of the four families, the elwny fam- 

 ily (Ebenacea;) contains the well-known persimmon (Diospyros 

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

 bell, or snowdrop tree (Mohrodendron carolinum). 



978. Order Gentianales. — Herbs, .shrul^s, yines, or trees. 

 Six families in the United States. 



The oliye family (Oleacca;) includes the common lilac (Syrin- 

 ga), the ash trees (Fra.xinus), the privet (Ligustrum). 



The gentian family (Gentianacea;) among other genera in- 

 cludes the gentians (Gentiana). 



The milkweed family (Asclepiadacea;) 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 (Conyolvulacea-) includes the 

 Vjindweeds (ConvoK'ulus), the morning-glory (Ipomrea), etc. 



The dcwider family (Cuscutacete) includes the dodders, or 

 "love-\'ines." There are nearly thirty species in the United 

 States. The stems arc slender and twine around other plants 

 upon whicli they are [)arasitic (see paragraph 170). 



The [ililox family (Polemoniacca-). The most prominent 

 genus is I'hiox. Over forty species occur in North America. 



The Ijorage family (Boraginacea") includes the heliotrope 

 (fleliolropium), the houiKl's-tongue (Cynoglossum), the forget- 

 me-not (Myosotis), and others. 



