unknown plant

unknown plant

Observation - unknown plant - Global. Description: bright yellow flowers on longish stalks,the leaves are greyish green and felt like velvet. The plants were around 3ft tall.The younger plants looked very similar to cabbages?

bright yellow flowers on longish stalks,the leaves are greyish green and felt like velvet. The plants were around 3ft tall.The younger plants looked very similar to cabbages?