oxford ragwort, senecio squalidus

oxford ragwort senecio squalidus squalidusaflowering plantin daisyfamilyasteraceae yellow-floweredherbaceousplant native mountainous rocky orvolcanicareas has managed find other homes man-made andnatural piles rockswar-ruined neighborhoodsand even onstone walls habitats resemble its well drained natural homeland plants have spread via wind rail activities ofbotanists travels short-livedperennialbiennial orwinter annualmake good subject studies evolution ecology flowering