By Linnea Covington, Special to The Denver Post Many people have a gleeful fascination with carnivorous plants, be that a Venus flytrap, pitcher plant, monkey cup or sundew. There’s something mysterious and exciting about a silent organism that can catch and digest an insect, and shoppers are now adding this flora to their pandemic plant collections. “I definitely see an uptick in general where all house plants are popular, but with carnivorous plants there has always been an interest,” said Colette Haskell, a horticulturist for Nick’s Garden Center in Aurora.