EXPLANATION OF THE FLORA 281 



the "genus cover." Its size when folded is 1 1'', \ Hi 1 ...' 

 inches. On the lower left-hand corner the name of tin- 

 genus is written. If one has many sheets in one genus 

 say more than 'lo it may l"- necessary to have more 

 than one cover for them. The covers are laid in cup- 

 boards flatwise, one on the other, and the sheets then 

 retain their shape and are always readj for use. 



explanation of the flora. The following flora eon- 

 tains 300 species of plants in L39 genera and 25 families. 

 These species are selected from common and representative 

 plants, in the hope thai 50 to 100 of them may be secured 

 ly any pupil. The pupil should collect his own specimens 

 as far as possible, and he should press and preserve them 

 after he has studied the structure. Familiarity with 100 

 plants will give the pupil a good grasp of plant forms, 

 provided he does n<>t stop with merely acquiring the names 

 and pressing the specimens. He should know how the 

 plants Look, where they grow, hew they associate with 

 other plants, how long they live, and the like. 



Avoid the use of keys as much as possible: learn to 



the plant as a whole: go directlj to the family, if 

 pi gsible. Bui it maj be necessarj to use keys at first. 

 In this in. ok coordinate part- of the kej are marked bj 

 the same letter: e.g., r. it. ppp, are three coordinate 

 entries. Coordinate entries are also introduced bj the 

 same catch -word, as "flowers," "leaves," "fruit." I sin 



a ke\ i8a pr 188 of elimination. Firsl trj the plant in 



a; if it does not belong there, u r, to \\. Then repeat 

 the search in b, bb, etc., until the family is found. 



Synonyms are placed in parenthesis immediately fol 

 lowing the accepted name. Thus "Impatiens biflora, 



Walt. /./""/'". Nuti . " means thai the i epted name i- 



Walter's biflora, bul thai the plant is also known bj 



Nut tail's name. 1 . 1 1 1 1 \ a. 



Proper pronunciation is suggested i>\ the accent, which 



i r 



