Cercidium (Parkinsonia) microphyllum - Palo Verde, Dipua

Palo Verde grow as a large bush or small to medium size tree. It has smooth, greenish photosynthetic bark. There are numerous species of Cercidium (sonorae, praecox, peninsulare), which can are referred to variously as Palo Verde, Palo Estribo, and Dipua. There is some confusion amongst the layperson as to what, exactly, this differentiation is. Thus, to such individuals, all Cercidium species are thought to be "Palo Verde". This, of course, is not the case. The below photos are of Cercidium microphyllum, which can be distinguished from other Cercidium species by the lack of nodal thorns. Instead of nodal thorn thorns the tree has closely crowded spiny branchlet tips in broom-like arrangements. 

Natives of the area used to (and probably still do to an extent) shell, toast and grind the seeds to store for winter sustenance. Reportedly, unless the seeds are fully ripe when harvested, dried and processed, they can cause severe diarrhea. The upper branches have been known to be used as a forage for mules, horses and burros (donkeys).

Bombacaceae, Pachira (Bombacopsis) glabra, Saba nut, American chestnut

Originating in Mexico, Guiana, and  northern Brazil, Pachira glabra is similar looking and closely related to Pachira aquatica, the Malabar chestnut. Despite its origins in America, I took most of the photos above in Gabon where it appears to be valued as a foodcrop.

I have about fifteen trees growing from seed I collected from a few trees I found planted along the street in a middle class neighborhood in San Jose, Costa Rica. In addition to this tree there were tropical olives (Simarouba glauca), citrus and macadamia nuts planted as street trees in the same neighborhood.

It is a small evergreen tree 4-6 m tall. The fruits are semi-woody capsules which stay green even when ripe. A pod contains many edible seeds which can be consumed raw or toasted/roasted/boiled. Considered to be one of the more notable underappreciated tropical food crops.

Like many of the Bombacaceae species P. Glabra has a very fat trunk to store water. Just after germination the girth of the trunk becomes noticeable, almost disproportional to the rest of the tree.

In Brazil the Saba nut is a fruit tree, cultivated as an ornamental in south-eastern areas of the country.  It is not very frequent in its natural habitat, the pluvial Atlantic forests from Pernambuco to Rio de Janeiro and the flood plain forests of Para and Maranhao.

Euphorbiaceae, Plukenetia conophora, Sacha inchi

Lecythis elliptica - Mini-Brazil Nut, Monkey Pot

This is a fantastic tree. I found it in a stand of three in a somewhat neglected Summit botanic gardens outside of Panama City. I have collected seed from these trees for years. Today all of the other Lecythis spp. were flowering profusely, this one was full of ripe pods. I already have about ten very healthy trees going in my nursery. Inside the baseball size capsule (a miniature version of L. zabucajo), there are numerous nuts packed together. A cream colored aril is attached to the end of each nut, the aril tastes like anise but I'm not entirely sure if its edible. The nut itself is one of the best tasting tropical nuts I have eaten, identical in taste to its close relatives, perhaps superior to Brazil Nut, although maybe that's because I was eating them fresh.The nut can be eaten fresh or roasted. In Brazil, an oil is extracted from the nuts to make soap.

The Pili nut (Canarium ovatum) is another great tropical nut.

See related info in entry for Lecythis zabucajo, Sapucaia Nut

Lecythis spp., mini-Brazilnut, ripe pods