ON SOME FAMILIAR COMPOSITES 



The extreme heat and long days of the summer 

 even in high altitudes in the United States makes 

 possible the cultivation of a large number of flow- 

 ers that were originally of tropical habitat. Among 

 these no others are more familiar or have retained 

 their popularity more steadily than the tribe of 

 plants of the genus Iponoea, which numbers among 

 its representatives plants of such diversity as the 

 morning-glory, the moon-flower, the cypress vine, 

 the yam, and the sweet potato. 



THE BRILLIANT MORNING GLORY 



It is not difficult to account for the popularity 

 of the morning-glory. A vine that grows with the 

 greatest rapidity and that bears flowers of striking 

 and brilliant color in the greatest profusion, day 

 after day, for weeks together, covering our arbors 

 or pergolas in a few weeks' time, has merits that 

 are not duplicated exactly by those of any other 

 flower under cultivation. 



The morning-glory has not been very exten- 

 sively worked with, but it has shown a marked 

 tendency to variation, and, as usual with plants 

 under cultivation, has broken up into numerous 

 varieties, showing in particular a wide range of 

 color variation. One of the most remarkable of 

 the varieties is the Japanese morning-glory, some 

 forms of which have double flowers of very curi- 

 ous structure. The single varieties of the Japanese 



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