It's quite possible that cinnamomea is mislabeled.  Inga cinnamomea suppose to be one of the bigger, meatier and better tasting among those species.
http://www.e-jardim.com/produto_completo.asp?IDProduto=375

Actually, he is a reason I want to do this because I don't trust him.  30% of Phoenix gardening community are completely head over heals in love with him, the other 70% consider him an obnoxious jack ass.  Not much middle ground with him.
He lost me immediately when he said that rootstock is completely irrelevant.

john_p_marmaro(z10 Florida)
Hi there

Many cacti of varying sizes produce edible fruits, many more than just the Opuntias. One of the more commonly planted large cacti in Florida and California is Cereus repandus, which produces large red edible fruit. Several species of Hylocereus, especially H. undatus and H. triangularis, produce edible fruits that have been christened "Dragon Fruits" in SE Asia and China where they have become extremely popular. These cacti, though, are very cold-sensitive and can only be grown well in zone 10. Some very large cacti that produce edible fruit include the Saguaro, Carnegia gigantea, as well as the Cardon, Pachycereus pringlei. Two other species of Pachycereus, P. schottii and P. weberi, known respectively as Senita and Candelabro, also produce edible fruits, those of P. schottii being referred to as "tasty"; these four species are very large. The literature does not say how large the Pachycereus species must be before flowering, but the Saguaros usually have to be quite large and old, say, 30 years and 10 feet or so. The Arizona Queen of the Night, Peniocereus greggii, and some other species of Peniocereus, P. johnstonii and P.serpentinus, also produce edible fruit. Smaller related cacti of the genus Echinocereus are famous for their fruit, a number of species being known as "Strawberry Cactus" because of their strawberry (and sometimes raspberry) flavored red or green fruits. The most notable of these are E. engelmannii, E. bonkerae, E. boyce-thompsonii, E. enneacanthus, E. cincerascens, E. stramineus, E. dasyacanthus, E. fendleri, and E. fasciculatus, as well as lesser known ones like E. brandegeei, E. ledingii, and E. nicholii. E. engelmannii's flavor has been described as "strawberry and vanilla". Among the smaller cacti, a number of species of Mammillaria produce edible fruits known as "chilitos" (they look like tiny red chili peppers) and the species include M, applanata, M. meiacantha, M. macdougalii, M. lasiacantha, M. grahamii, M. oliviae, M. mainiae, M. microcarpa, M. thornberi, and many others; -- a related genus is Epithelantha, the fruit of all species of which is also said to be edible and quite like those of the Mammillarias. Similar too is that of Coryphantha robbinsorum and C. recurvata.

A commonly found cactus in many garden centers is Myrtillocactus geometrizans, which grows quite large; it produces edible berries known as "garambulos" which are said to be quite tasty, rather like less-acid cranberries. Another genus of large cacti is Stenocereus, almost all species of which produce fruits good to eat: They include S. fricii ("Pitayo de aguas"), S. griseus ("Pitayo de Mayo"), S. gummosus ("Pitahaya agria", said to be quite sweet but prone to ferment, hence the "agria" [="sour"]), S. pruinosus ("Pitayo de Octubre"), S. montanus ("Pitaya colorada"), S. queretaroensis ("Pitaya de Queretaro"), S. standleyi ("Pita Marismena"), S. stellatus ("Xoconostle"), S. thurberi "Organ Pipe Cactus", "Pitayo Dulce"), and S. treleasi ("Tunillo"). The genus Harrisia of Florida and the Caribbean also produces edible fruits known as "Prickly Apples", the endangered endemic Florida species H. aboriginum, H.simpsonii, H. adscendens, H fragrans, and H. eriophora standing out, though the fruits of most Harrisia species are edible, including the Argentinian H. balsanae. Some of the barrel cacti such as Ferocactus hamatacanthus, F. histrix ("borrachitos"), and F. latispinus ("pochas") also produce edible fruits, as well as edible flower buds. Many species of South American Corryocactus (also known as Erdisia) produce tasty berrylike fruits, including C. brevistylis, C. pulquiensis, and C. erectus. The large South American complex of Echiopsis/Trichocereus includes a few species with edible fruit also, such as E. (or T.) atacamensis, E./T. coquimbana and E./T. schickendanzii. Epiphyllum, the Orchid cactus, has one such species, E. anguliger (also called Phyllocactus darrahii), the fruits said to be like gooseberries. Also like gooseberries are those of the fairly well-known Pereskia aculeata (hence its common name "Barbados gooseberry"); another Pereskia (which are primitive cacti, and in fact, are leaf-bearing trees or shrubs), P. guamacho, also produces edible fruits.

There are probably many others as well, but these should be enough to go on with!

Sources, besides the net, include Cacti of the Southwest by W. Hubert Earle, and perhaps the finest available book on cacti, The Cactus Family by Edward F. Anderson.

Besides eBay, on which some of these species may be found from time to time, many commercial cactus nurseries carry some of them; most of them may be found at Mesa Garden, though they will be small plants. I have seen large Echinocereus engelmannii or E. stramineus on eBay, as well as large specimens of some of the columnar types listed above. Other recommended nurseries include Arizona Cactus Websales, High Country Gardens, Old Man Cactus, Miles2Go Succulents, Calplants, Cactus Limon and TeeDee Cacti.

Not a lot of info exists about climate zones and such-- pay attention to where the cacti grow naturally. The Illustrated Encyclopedia of Cacti by Innes & Glass include light and soil requirements as well as flowering periods, but only occasional references to tenderness.

Hope this is food for thought!

John P Marmaro