Why do this map's boundaries end exactly at national boundaries? Last I knew, plants can't be national citizens, nor do they show any regard for national boundaries. I'm pretty sure I've seen this thing growing in the United States... and it doesn't make sense that it would appear in North America, South America, and parts of Central America but not all of Central America. How do they know not to grow in Costa Rica, Nicaragua, Belize, and Guatemala? How do they jump over these countries and colonize Honduras and El Salvador? I'm not saying it's wrong, because I'm definitely not an expert... but this map is weird. Guypersonson (talk) 06:36, 14 December 2011 (UTC)
