This is the variety of jalepenos found in supermarkets.
 
"70-80 days. This heirloom jalapeno variety produces a slightly larger fruit, and the fruits are 3" long and 1" wide. The plant is taller than other types. Jalapeno M can be planted in containers and are an excellent option for patio gardening. This heavy yielding pepper produces plants that are between 2,000- 5,000 on the Scoville scale. Green Jalapeno M can be picked and eaten or pickled. Red Jalapenos can be dried, and dried jalapenos are called chipotles." - True Leaf Market