annual arctotheca calendula cape daisy cape dandelion cape gold cape marigold cape weed 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 arctotheca-calendula cape-daisy cape-dandelion cape-gold cape-marigold cape-weed capeweed hairy-stems lobed-basal-leaves squat-perennial bright flower golden green herbaceous-plant pointed-petals shade shadows stamens sunlight sunshine