This yellow flower is Haplophyllum rosmarinifolia. It is a rare and endangered plant but it seems to do well here on the estepa of the Parque Natural de Cabo de Gata which is its natural habitat. The leaves resemble those of rosemary.
These pretty, tiny blue irises are quite common here. The flowers close up at night and open at midday.
Here are some photos of butterfly orchids (Orchis papilionacea).