Capsicum Annuum Peppers are the most popular and widely grown pepper throughout the world. Annuum are one of the easiest to cross-pollinate with other pepper species. Therefore, it is no wonder why there are so many annuum crosses on the shelves and planters.  Some of the more well known annuum species include all sweet Bell peppers,  most Nu-Mex varrieties, Jalapeños, Thai, Cayenne, Cherry, Pimento and Pasilla’s, not to mention the infamous Peter Pepper.