Tons of vendors sell anything purple as Black Pearl.
Black pearl has purple flowers(not purple and white or whatever),it has ROUND pods,no other shape.
The Hybrid is a secret.
Chileman-
http://www.thechileman.org/results.php?find=Black+Pearl&heat=Any&origin=Any&genus=Any&chile=1&submit=Search
It seems to grow true from isolated seeds.
I see Black Prince and several other plants sold as Black Pearl.
IF it doesn't have round pods it isn't a pure black pearl.
I see plants with White ,Purple and green variegated leaves sold as Black Pearl.
I got my first plant in mid 2000.
My plants have always been very distinctive as far as looks etc.
Great plant,but a lot of other stuff is sold as Black Pearl.
I see green Black Pearl and a lot of pointed podded and leafed plants called Black Pearl.
Though a few Black Pearl plants had dark green and redish leaves but got darker as the plant aged.
I have Isolated seeds from grown outs of my original Black Pearl.
I just stuck a couple sprouted seeds in my sprouter for them an hour ago.
IF you want to trade,I know where my seeds came from and they have grown true so far from isolated seeds.
Nice Plant,pods are hot with very little taste in my opinion.
I dry them and add them to powder mixes of sweets.
EDIT:
http://naldc.nal.usda.gov/download/19417/PDF
See Origins...EVERYTHING YOU EVER WANTED TO KNOW.
Royal Black and another developed pepper - '86 Arboretum-It produced the
F8 stable Hybrid(Black Pearl).