What is this fruit?

[lljkk]

I thought I posted this earlier ... Does anyone recognise what these are? Some kind of fruit in our greenhouse, a bit longer than a AA battery.

Are they lychees?

ta 4 reply. no, they are hollow inside like air sacks. I thought they were some kind of chili, but are tasteless & don't look like any chili I can find online.

If you have twitter try @simplyplants - normally good for identifying plants, not sure about fruit

Wild cucumber?

They look a bit like pale, empty horse chestnut cases.

another pic

They are hollow inside, like peppers, but I can't find a pepper like them. And they have flat black seeds that are maybe 5mm long.

I'm afraid of twitter, sadly!

What does the plant look like they came off? Leaves? Pics? Interesting!

I can only post 6 pictures today, but here goes. This the plant leaf, heartshaped.

The plant is long and viney with thin stems, like a green bean. Here is the fruit growing on the plant.

last one, this is what inside of the fruit looks like. See black seeds.

I definitely think it's a member of the circubit family. It's a big family though so that hasn't really narrowed it down that much. When you say hollow inside it puts me in mind of a loofah which is in that family.

I think wild cucumber, too.

It looks like a guanabana

guanabana

Although loofah is probably more likely, because you can buy the seeds here, usually as a novelty plant.

Rubicon do a guanabana juice and it's lovely!

Sorry, the leaves look wrong for what I thought

The leaves and plant are not right for a Guanabana. Did you plant the seeds yourself OP? Curcubits are notorious for cross pollinating with other varieties and producing a different plant from the parent plant.

Squash of some kind. The leaves look marrow/courgettish to me.

Someone was giving small plants away at work, back in July, and I didn't pay enough attention to what it was .
Squash & cucumbers are solid inside (mostly, I guess pumpkins are exceptional). Guanabanas are solid inside, too, I think?

It's like a flavourless spikey small pepper with black seeds.

The seeds are wrong colour for chillis or peppers.

omg, look at the boob plant.

I am guessing that they saved they seeds from their previous crop, but they had cross pollinated with something else. The shape is similar to a lemon cucumber or Crystal apple cucumber, which are both a bit spiky, but not as spiky as your fruit. The 'dad' could have been anything from a courgette or squash to another type of cucumber or a melon.

I saved the seeds myself from a Friend Prince squash (same family) once and had an amazing variety of results from the seeds from that one fruit, few of which were usable. Some were empty like your fruit.

I may be wrong of course. Ask your colleague about the seed, maybe.

Maybe a cherimoya?

ooh, I love cherimoyas, definitely not one of them.

It's Achoca, nice in stir fries when young.....

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