INTRODU< I [( >\ 



1 olla funnel-form." The common morning glory shows the feature, in. 



and hence belong* to the genu* "Ipomoea." Under thii genui, the choice ii be, 

 'I Flowers opening in the morning" and "(2) Flower, opening .1 night." As the name itself indi- 

 cates, the morning glory belong, in "1." Under "1" the ft I form corolla leads to the 



"•'• : "" 1 ander " ;l " ,|K ' ll """- Ml" "Pen "(l)Leaves cordate, entire; stem hairy,— ] purport 



I. Odd-pinnate. 2. Tendril-pienate. 3. Even-pinnate. 

 Hie same method is used in locating any plant whose name is desired. The essentia] points in 

 using the kej are: Its,, that the choice must be made between two, rar.lv three, alternatives. These 

 alternatives an- mdented the same distance from the margin, and are numbered or lettered in sequence, 

 for example, "I" and "II," "a" and -l.." and "(1)" and "(2)," «x," -v.- ami «z," etc. Secondly, 

 alter choice has been made of one alternative, no further attention is paid to the other alternative. 

 In making the choice between them, however, it is essential to read both, as one often throws light 



VI. Compound Leaves 



4. Palmate or digitate. 



5. Twice-pinnate 



