It looks like some kind of tree pest, but the 'Brazilian berry,' as it is sometimes known, is a deliciously tart fruit that makes a great smoothie ingredient. The berries are unusual in sprouting along the trunk of the tree, earning them the nickname 'tree grapes' in their native Brazil.
Sometimes called a 'star apple' in English, the caimoto looks fairly plain on the outside but is a thing of beauty once sliced open. Found in tropical America, the West Indies and Southeast Asia, it's a sweet treat by itself or added to smoothies.
Popularly used as a juice ingredient in Colombia, the antioxidant-packed Lulo looks like an orange from the outside. Slice it open to reveal a tart fruit that usually takes some sweetening before eating or drinking.
This chunky fruit's appearance has been compared to an 'exploding planet', but its taste is comparable to a sweet combination of mango, pineapple and sugarcane. Found in the Pacific Islands, Hawai'i and parts of Asia and Australia, its 'cones' can be broken off and chewed raw.
The 'mountain papaya,' as it is also known, is rarely seen outside of Ecuador, Colombia and the surrounding regions. Smaller and even sweeter than papaya, it's a vitamin-rich addition to desserts.