We went up to Tenacatita yesterday and decided to check out Agua Caliente on the way. Agua Caliente is just a little north of the Tenacatita road on the river and thru town used to be the main road to the beach. Elke and John had not been there but Marcos and I had. Elke and John had also never tried Guamuchil and there was a large reclining tree next to the river just full of the fruit. Guamuchil is not something most people would go out of their way for but they are popular in road side stands and can be used for agua fresca (almost any fruit drink)
I was lucky to get the spelling right for a Google search ... and then looking further found all these others. They are possibly part of the Tamarind family and you don't eat the black seed. These looked totally ripe but were a bit drier than I've had before.
After - we drove thru town and out to Tenacatita and I think we spotted Bill's place on the far end across from the river.
Often planted for living fence or thorny hedge, eventually nearly impenetrable, guamachil furnishes food, forage, and firewood, while fixing a little nitrogen. The pods, harvested in Mexico, Cuba, and Thailand, and customarily sold on roadside stands, contain a thick sweetish, but also acidic pulp, eaten raw or made into a drink similar to lemonade. Pods are devoured by livestock of all kinds; the leaves are browsed by horses, cattle, goats, and sheep; and hedge clippings are often gathered for animal feed.