I'm not a biologist, my interest in these fruit is mainly in eating them. Hence all names from wikipedia and/or asking Thai friends for the Thai name. Pictures mostly from internet as I either forgot to take pictures when I saw the fruit or don't know when I took the pictures and won't search for them now. You could argue that the only original content in this post is that I have eaten all of them!
Eugenia uniflora (pitanga, Suriname cherry, Brazilian cherry, Cayenne cherry, Cerisier Carré, มะยมฝรั่ง)
Phyllanthus acidus (Otaheite gooseberry, Malay gooseberry, Tahitian gooseberry, Country gooseberry, Star gooseberry, Starberry, West India gooseberry, Gooseberry tree, มะยม)
Threes are indeed hanging full of these fruit as in the picture. I either bought or picked some of them, hard and bitter, not edible by my standards. Just looking at the picture makes me shudder!
Phyllanthus emblica (emblic, emblic myrobalan, myrobalan, Indian gooseberry, Malacca tree, amla, มะขามป้อม)
I bought these at a market (20 THB for 10 fruits about 30-35mm diameter), and vaguely remember them to be too hard and too bitter for my taste.
Eriobotrya japonica (loquat, Japanese medlar, Japanese plum, Chinese plum, Japanische Wollmispel, Chinese: 枇杷; pinyin: pípá) https://en.wikipedia.org/wiki/Loquat
Loquat is linguistically related to Kumquat, but not botanically.
I saw these recently (Mar2018) in Taiwan, and after asking a friend about the taste, I bought a pack (100 TWD = 110 THB for the one shown; same mass of bigger fruit more expensive; all I have seen packed as lavishly as the one shown in picture). But it was worth the money, they are delicious, similar to peach.
Copyright 2018 ChristianPFC