I started trying to sort the bean-mess out once but got distracted by other things.
Below is a copy-paste from another post I made here
which might help a bit.
I've been trying to untangle some of the bean-family-tree.
This is the only reasonably easy to understand diagram I managed to find, though it's not exactly comprehensive.
I found that here.
species are all from central and South America
- french bean, common bean, kidney bean, flagelot, haricot vetts
- runner bean, scarlet runner, haricot's d'espagne
- lima bean, madagascar bean, butter bean
- tepary bean
- peanut, monkey nut, from America
- pea, from Europe and Near East
- broad bean, fava, from the Mediterranean
- lentil, from the Mediterranean
- cowpea, asparagus bean, black eyed pea from Ethiopia
- mung bean, green gram
- adzuki bean
- Indian gram, garbanzo bean, chick-pea from Ethiopia
- soybean, from China
There seem to be a few others too, but these are the common ones.
The common names are, I suspect, going to get confusing, but I'll de-tangle as best I can. I'm using a copy of Roger Philips book about Vegetables
as my guide as he does seem to attempt to be fairly complete and accurate, unlike most books which tend to describe vegetables by their use rather than their families.