I have pictures of the fruit, I didn't have a camera with me when I was near the tree but I did take a lousy photo out a car later on, so if you're desperate to get a fuzzy idea of the tree I will find that photo. The tree was growing in a pot outside and was 5-6 feet tall, with several of these fruits on it yesterday in Jalisco state. This one had fallen, the ones still attached were a fresher red-pink with no spots. They were shiny and looked artificial. Unfortunately my guide and the shopowner didn't know the tree. Maybe you will!

reminds me of Thevetia ahouai???

tofitropic said:reminds me of Thevetia ahouai???

Wow! That's what it looks like, although there seem to be many species of Thevetia, and not a lot of photos for me to browse. T. ahouai is native to Jalisco, so it seems very likely.

Thanks so much! How did you come to know this plant? I googled for 2-lobed red (or pink) fruit and got NOTHING. Was 2-lobed wrong?

Also, do you have tips on seed germination?

I've seen this in the past. and the fruit is quite typical of some Apocynaceae with two lobe fruit

I never grow any of Thevetia, but perhaps they germination will be similar to the Thevetia Peruviana / Cascabela Thevetia, which germinates easily and grow veral in my place.
Some source said it geminates around 4 weeks at a temperature close to 30 ° C. fresh seed might be faster to the dried ones, but I'm not sure.

Thank you so much!