On 16/08/2015 3:43 AM, Julie Bove wrote:
>
> > wrote in message
> ...
>> Normally I boil rose potatoes for potato salad, but there were none
>> to be found last week. So these were mill-run red potatoes. I set
>> the water boiling as I scrubbed them and dug out the eyes. When the water
>> boiled I chucked them in.
>>
>> They were done after 30 some minutes, so I drained and peeled them.
>> To my surprise, the stem ends of almost all of them had acquired an
>> unpleasant black hue. I cut them off, but why?
>
> Stem ends?

Yes, where the rest of the plant attaches to the potato beneath the ground.

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Xeno