attract-prey attracted attraction carnivore carnivorous carnivorous-plants clumps clusters coloring colors colouring colours cover devour digest digested digesting display distinctive edge edges enzymes flora flowers funnel herbaceous insect-trap insects nectar-like-secretions nutrient-source nutrients operculum passive-trap perennials pitcher-plants pitchers pitfall-traps plants prey proteases rims slippery species trap unusual variations variety vegetation veins appearance beneficial carrots colored colorful coloured colourful contrast contrasting cooking courgette cucurbita-pepo culinary cut daucus-carota edible fast-growing flavouring food fresh fruit golden-zucchini health health-benefits healthy nutrition nutritious raw root-vegetable sliced summer-squash surface surfaces taproot texture textures variable vegetable vegetables yellow yellow-squash yellow-straightneck-squash zucchini