crunchy cultivar cultivated earth-apple edible elongated food ginger-like helianthus-tuberosus herbaceous-perennial inulin Jerusalem-artichoke knobbly nutty potato-substitute root-vegetable sunchoke sunflower-species sunroot topinambour tubers uneven vegetable Asian Asteraceae bloom blooming blooms clusters curled curling distinctive flower-heads flowering-plant flowers herbaceous-species ironweed lobes medicinal-plant overlapping-bracts perennial-plant petal-cluster petal-strands petals plant purple shrub stiff-upright-plant vernonia wildflower appearances attracted attraction carnivorous carnivorous-plants clumps coloring colors colouring colours cover digest digested digesting display edge edges enzymes flora funnel herbaceous insect-trap insects nectar-like-secretions nutrient-source nutrients operculum perennials pitcher pitcher-plant prey proteases rim sarracenia species trap unusual variations variety various vegetation bulbs bushland-infestation bushland-weed cluster color colour competing cormous-plant delicate flower fragile fragrant freesia-alba-x-leichtlinii freesias funnel-shaped garden-plant golden introduced-species orange perennial perfumed prolific scent scented seed seeder South-African stem streaked strongly-scented weed weeds yellow bushland infestation bushland weed cormous plant flowering plant freesia alba x leichtlinii garden plant introduced species South African strongly scented white beautiful beauty droplets drops fragrance rain rain-drops wet