The Nettletrees of Bóquer by the Catalonian artist Hermenegildo Anglada Camarasa in the Museu Nacional d’Art de Catalunya.

http://museunacional.cat/en/colleccio/nettletrees-boquer/hermen-anglada-camarasa/156067-000

https://en.wikipedia.org/wiki/Hermenegildo_Anglada_Camarasa