Anyone know what this plant is?

[Taylor T.]

I found this plant earlier, and I'm not sure what it is. Does anyone have any ideas? It has yellow sap and in the summer it has yellow flowers. My Russian Tortoise made a beeline for it, but I managed to stop him before he ate any.

 

[Tidgy's Dad]

My guess would be greater celandine (Chelidonium majus), as opposed to the lesser celandine which has much fleshier, heart-shaped leaves. It has yellowish sap and yellow flowers as you describe, but so do others. Without flowers it is difficult.
But I am far from certain, I'm sure others will pipe up soon.

 

[Taylor T.]

Okay thanks. Good thing I stopped him before he ate any.

 

[Tidgy's Dad]

Like I say, I'm not certain.
But until someone else says for sure what it is, better safe than sorry.
Greater celandine not at all good, so tis said.

 

[johnsonnboswell]

Looks like celandine to me, too.

 

[Taylor T.]

Alright I'll definitely keep him away from It. Thanks for all the help!