Your photo looks like a lima bean (Phaseolus lunatus). These are intended for use as a shell bean either a green shelly or a dry bean. The pods of all varieties are inedible. Sources of Romano include
http://www.burpee.com/vegetabl... http://sustainableseedco.com/h... http://www.allensterlinglothro... http://www.neseed.com/Bean-See... I use NESeed mostly. Territorial
http://www.territorialseed.com... has newer Romano type type varieties Musica, Helda/Hilda, Super Marconi. There are other varieties but tha should give you a starting point.
Let you present crop fill with beans to point that some pods are showing yellow and then shell them out. You may have a delicious baby lima.
