I believe those are called Lemon Drop Peppers. I found one stray plant in a nursery this Spring and planted it. I'm in the PNW, so doesn't get very hot here for long enough to grow very hot peppers but these did very well for me although only a few turned yellow, most remained green, and it was quite prolific. To me, they had a slight citrus flavor and were quite hot compared to other varieties I've grown. When I pulled the plant I ran all the peppers in a food processor to grind up chunky style, added a small can of Herdez salsa and used it as a dip with chips. Holey Moley....some very hot, spicy dip...bringing a sweat to your scalp even. I'll plant again next year....Willie