Notes and Cross-References

The Nopal, or Prickly 
Pear, which you may observe in the Mexican coat of arms, is a 
very interesting and valuable production of Mexico (see 
chapter 4 below). In some districts 
of the upper country, it grows in great abundance, and forms, 
in places impenetrable thickets, higher than a man on horseback. 
This plant produces an immense quantity of fruit, which, together 
with the young leaves, furnishes food for vast herds of cattle 
and wild horses. On this account, the Mexicans, when selecting 
land for a stock farm, always choose that which has a good proportion 
of the Nopal.

... Opuntia ficus-indica]]>
Advanced Markup Concepts, slide 8 of 16