Famine food and information

I was just trying to find translations for the Latin names in Robert L. Freedmans famine food list (the pages takes quite some time to load since it is long and it is just a buffer application for now) What I noted is that for many plants there is just the Latin name. This helps scientists, but not people. Almost none of them are in Wikipedia, but just in botanical databases at Universities ... this somewhat does not make sense to me: at least people in the countries where these plants grow need to know about them - eventually they even do. But it is not said that this knowledge is spread. People in one place can use the plant and in others not - there is a very simple example: nettles are eaten in many parts of the world, they also grow here where I live, but here people don't collect them. They simply don't know that their vegetables grow right outisde their house. It's the same for many other plants here - and this part of the world is well connected: so how are things for those parts where people are not connected and how many famine problems could be solved just by "information" ... hmmm ...