It is definitely a plant, but is it edible? I think it looks rather like kale, the vegetable. 5 to remember
¿Qué es eso? – What’s that?
seguro – definitely
¿lo es? – ¿is it?
comestible – edible
la col rizada – the kale

Answer: Mistle thistle. April 14, 2015

‘Mediterranean Garden Plants’ by Lorraine Cavanagh [UK: Santana]

And if you’d like to tweet a link to THIS post, here’s my suggested tweet:
It is definitely a plant, but is it edible? #Plants in #Spain http://wp.me/p3dYp6-1G2 via @Spanish_Valley