APPROACH TO A HIGHER STRUCTURE. 73 



because nearly all the plants are natives of hot 

 countries, and are not likely to offer any difficulty 

 to us. Among them are the useful yams, culti- 

 vated as potatoes, and the esteemed sarsaparilla 

 plants, much employed in medicine. But if you 

 want an English specimen of this kind of growth, 

 you must search for Herb Paris, that odd-looking 

 plant called by country people True Love, which 

 grows about a foot high, and bears four broad egg- 

 shaped leaves at the top of the stem, and a green 

 blossom followed by a purplish-black berry." 



" I wonder what makes these plants so different 

 from all the rest of the endogens," said Henry. 

 "Perhaps we are coming near the net- veined 

 plants, and so these are gradually getting like 

 them, just as the tribes of animals gradually came 

 near each other, as we travelled upwards." 



" You are right, Henry," said his father : " we 

 are now coming to the important and almost end- 

 less races of exogens, which make up the great bulk 

 of the vegetable kingdom. And now I must tell 

 you of another mark by which the three great 

 divisions of the vegetable world are distinguished 

 by botanists. The first or flowerless division has 

 no true seeds ; the second and third divisions have 



