PROBLEM 2. The Kiihis of rimits of the Earth 



83 



Fig. 109 (above) Chestmit. These leaves have 

 feather net veining. (schneider and schwartz) 



Fig. 1 10 (upper right) Maple. These leaves have 

 palviate net veining. (schneider and schwartz) 



Fi(,. 1 1 1 (right) This lady's slipper, an orchid, 

 has the typical parallel-veined leaves of mono- 

 cots, (gehr) 



tant differences, too. G rass plants a re 

 representatives of one large division of 

 the flowering plants, the vionocotyledons 



(mono-cot-i-lee'dons) or monocots for 

 short. Oak trees represent the other large 

 division, the dicotyledons or dicots for 

 short. It is easy, for TRSti 10s L pal L, Lu Lcll 

 these two groups apart. Thelea^xs ^of 

 the__jiionQi iots have ma tiy Inng y.^*^ 

 running from one end of the leaf to the 

 other and close to one anoth^er. SeeFig- 



ure III. The leaves of the dicots have 

 vems and a laTge net- 



few 



)rinc 



?' 



wo rk of smalle r veins. See Figure no 

 and do Exercise 8. You will learn other 

 differences between monocots and dicots 

 but you must not get the impression 

 that all monocots are small and dicots 

 large. In both groups there are large and 

 small plants. 



There are so many kinds of flowering 

 plants that botanists find it convenient 



