Okay, okay, the talk of Garcinias has made me dip back into my notes from when I was first researching the potential layout of our new garden years ago. Below is a bit I compounded from a few different sources about Bacupari that may be useful for the shade tolerant fruit tree query. I am getting excited about opening the door to the idea of planting a mangosteen cousin I had previously excluded for various reasons. The info is as follows:
Bacupari #2739 (Garcinia macrophylla): Z10a. Damage temp 27F. Sweet fruit like tangy custard, children love it, leaves are anti-inflammatory. Is it the Rheedia or Platonia variety? The Bacuriparí is native to the Amazonian lowlands, where it grows as an understory tree. The tree can grow to 30', forming an attractive, pyramidal canopy (Campbell 1983). Trees are propagated by seed and may require 7 to 10 years to come into production. Fruit are variable in shape, averaging 1 1/2" to 2" in diameter and 2" to 2 1/2" in length. The fruit have a thick, hard outer wall containing a bitter latex, as in bacurí. Inside the hard shell is a white, creamy flesh surrounding 3 to 4 large seeds. The flesh is scanty in comparison to Mangosteen or Bacurí. The Bacuriparí is outstanding because it grows and produces a significant crop in shaded conditions (Campbell 1983). The trees are also tolerant of full sun and wind exposure, making them more adaptable to varied climates than the Mangosteen. There is considerable variation in fruit quality among Bacuriparí from different regions of South America, and there may be different species involved. The fruit is not much esteemed but widely eaten and sold in native markets. The bacuripari was introduced into Florida in 1962 and planted at the Agricultural Research and Education Center in Homestead, at Fairchild Tropical Garden and in several private gardens. One tree fruited in 1970, another in 1972, and the latter has continued to bear. Young specimens have been killed by drops in temperature to 29º to 30º F. Older trees have been little harmed by 27º to 28º F. The tree is accustomed to light-to moderate-shade. Seeds have remained viable for 2 to 3 weeks but require several weeks to germinate. In Brazil, the tree blooms from August to November and the fruits mature from December to May. In Florida, flowers appear in April and May and a second time in August and September, and the fruits are in season from May to August and again in October and November. Some 15-to 20-year-old trees have produced 100 to 200 fruits when there have been no adverse weather conditions.
BacuriparÃ* - Garcinia macrophylla
http://www.onlyfoods.net/bacupari.html; Rheedia brasiliensis, Rheedia laterifolia, Garcinia laterifolia, Bakupari, Camboriu - TopTropicals.com