My avatar is me holding a Morina twig. Hard to see the Moringa leaves but some of you have seen a much larger version of the same picture.
http://www.echotech.org/mambo/index.php?option=com_docman&task=doc_download&gid=301http://www.echotech.org/mambo/index.php?option=com_docman&task=doc_download&gid=302Not something that you can grow north of the deep south of the USA, or in the subtropical parts of southern Europe, etc. But worth growing in parts of Australia and drier parts of tropical/subtropical South America.
I've tried it. Filipinos eat them--probably in salads--and so they are sold in a few stores here. Fresh they taste slightly and vaguely like horseradish, but not strong enough that the flavor should be a problem to most folks.
Indians (in India, not "Amerinds") chop them up to make mock-horseradish chutney. M. oleifera is native to India where it is a traditional food, and M. stenopetala is a relative from Africa that has been discovered to be similarly useful except even more drought-tolerant.
The wonder of this tree is that...
* it is extremely drought-resistant. The African version rarely bothers dropping its leaves through seasonal drought, though it can in severe drought. They have deep roots, and go dormant during drought.
* it is one of the few trees whose leaves are palatable and nutritious for humans
* the leaves are roughly 5.7% COMPLETE protein, which is very unusual for a leafy vegetable
* fresh but not dry leaves are rich in vitamin C. Dried leaves remain high in carotene and some B vitamins.
* therefor it provides a crop that does not have to be replanted every year, making it terribly useful for permaculture and low-energy farming
* the pods are edible and considered fairly succulent (tho there is a problem--to get the pods, you can't keep the trees chopped to a low, manageable height which is what is ideal for harvesting the leaves--otherwise you end up needing ladders to harvest anything...)
* The leaves can be preserved by drying. They are crushed and the powder consumed with water to provide protein and some vitamins for nursing mothers. One of their common names is "mother's best friend", although it is more commonly known as the "drumstick tree" for the edible pods.
* Crushed seeds are a source of machine or lamp oil that is supposed to be fairly easy to extract
* Crushed seeds have interesting property of clarifying water. It still has to be boiled at that point, but it renders highly muddy water more suitable for drinking.
I have seeds of both species sitting on my desk.
Here's a whole book on it in case the ECHO white papers aren't good enough:
http://echobooks.org/product_info.php?products_id=720