FAMILIES OF FLOWERING PLANTS. 



75 



lanceolate leaves and flowers in aments, the individuals of difl'erent 

 sexes. The ovary consists of a single carpel which ripens into a dry 

 stone fruit or di'upc^ as it is technically called. In habitat the plants 

 are conflned to deep swamps. 



Family Juglandaceae. Walnut Family. This represents another 

 distinct order, and includes six genera, the most important being 



the walnut and IH.coi'ia, the 

 hickor3\ Tlie walnuts num- 

 ber about 8 species, the 

 hickories 15 or 20. They 

 are natives of temperate re- 

 gions, Ilicoria being confined 

 to North America. All are 

 trees, with odd-pinnate leaves, 

 and monoecious flowers, the 

 staminate and pistillate aments 

 beino; borne on the same 

 branch. The fruit is the 

 well known nut of commerce. 

 From Juglans we obtain the 

 butternut, the black w^alnut, 

 and the English walnut, 

 which can be successfully cultivated in certain parts of the United 

 States. Ilicoria furnishes the shagbark hickory nut and the pecan. 



All the plants belonging to the foregoing orders are aaemophiJous^ 

 that is, they are fertilized by the agency of the wind, which l)l()ws the 

 pollen from the staminate to the pistillate aments. There is therefore 

 no need of u showily -colored perianth to attract insect visitors. 



£ A/ P <^- 

 Fig. (11.— The Biyberry, Myrica Carolinensia. Original. 



