appearances arid Cacti cactus clumps clusters coloring colors colouring colours display edge edges flora frilled frills garden-display garden-plants green irregular leaves light ornamental perennials plants pointed protection ribbed ribbing ribs shape shapes sharp short-spikes sky small-spines spikes spines spiny succulents sunlight surface surfaces textures unusual variations variety various tall african distinctive greenery patch section shade texture angles arrangements below blooms bulbs color colorful colour colourful displayed dome exotics floral flower-dome flowers foliage fountain garden-flowers horticultural horticulture hyacinths nature open peaceful pedestrians people perennial petals photgraphers photography public shadows style tourists tulips visitors attract-prey attracted attraction carnivore carnivorous carnivorous-plants cover devour digest digested digesting enzymes funnel herbaceous insect-trap insects nectar-like-secretions nutrient-source nutrients operculum passive-trap pitcher-plants pitchers pitfall-traps prey proteases rims slippery species trap vegetation veins