annual arctotheca-calendula cape-daisy cape-dandelion cape-gold cape-marigold cape-weed capeweed competitive daisylike edible flowers groundcover hairy-stems herb invasive-weed leaves lobed-basal-leaves noxious-weed ornamental petals plant prolific rosettes spreader squat-perennial stolons taproot vigorous weed yellow bright flower golden green herbaceous-plant pointed-petals shade shadows stamens sunlight sunshine