I found this Lamiaceae with tiny blue corolla on several occasions in dry river beds ('barrancos') close to habitations in Tenerife, Canary Islands. I believe it is a non-native species, introduced with sewage sludge (along with Solanum lycopersicum, Cucurbita spec., Helianthus annuus, Phalaris canariensis, etc.). I guess it either is a spice or a birdseed impurity.
Thank you in advance for your suggestions.
Best wishes,
Filip