Since the above mention webpage is a bit confusing:
I c/p a bit from it:
lLima bean = butter bean
= Madagascar bean = wax bean Pronunciation: LIE-muh
Notes: With their buttery flavor, lima beans are great in soups or stews, or on their own as a side dish.
The most popular varieties are the small baby lima bean = sieva bean and the larger Fordhooks.
You can get limas fresh in their pods in the summer, but many people prefer to use dried lima beans. Shelled frozen limas are a good substitute for fresh, but canned limas aren't nearly as good. The biggest downside is that lima beans are harder to digest than other beans. Substitutes: fresh lima beans OR fava beans (more flavorful) OR soybeans
I don´t agree with the suggestion that limabeans could be substituted with favabean or soybean they have a compleetely different texture and flavour !
And I don´t find them harder to digest than pther beans- but then again they are benficials for me.....