Any idea what this fruit is?

[dilettante]

At work the other day I came across a huge tree, that had littered the ground with strange fruits. They looked like unripe oranges, but when I opened on, it was unsegmented and had a big stone in the middle. The tree itself is huge, with leaves that reminded me of rowan. I asked someone, but they didn't know what it was either, they just said it was inedible. Any thoughts?

Sorry, I didn't get a picture, but I'll post one on Friday.

[Aberdeenplotter]

yups, bit difficult without seeing it

[veggiechicken]

Was it a plane tree?

[marchogaeth]

What shape was the stone? I'm wondering about almonds - some have very bright fruit but I'm not sure the leaves would look like Rowan.

[Martin H]

Could be a walnut tree, maybe?

[mothhawk]

I think you're on the money, Martin, sounds like walnut to me too.

[dilettante]

Martin I think you win. That would also explain why there were so many walnuts in the compost! Thanks guys. I'm going to have to collect them.

[marchogaeth]

Note to self:- read more carefully"un ripe oranges".

[yummersetter]

The outer casing stains your hands, so wear rubber gloves.

[dilettante]

Thanks for the tip. Don't suppose it stains them brown, because I've been scrubbing my hands all week thinking somehow mud has permeated my skin

[Scarlet]

Haha, yes that brown stain takes days to go away!