5. GWEN—Bred from the hass variety in 1982, the gwen is a slightly larger, army green version of its darker-hued parent. Harvested from the late winter through the summer, the oval-shaped fruit, roughly four inches in length, has dense, gold-green flesh possessed of a buttery and slightly smoky flavor, somewhat akin to that of chipotle chiles. When the fruit is ripe, its green skin dulls slightly; refrigerated, the ripe fruit will keep for up to two and a half weeks, like its forebear the hass. The fatty, rich flesh of the gwen is delicious on its own or spread on bread like butter.