high barbed euphorbia, cactus green, on the window

background beautiful beauty botany bright cactus collection columnar decor decorative design euphorbia evergreen flora flowers focus grass green grows high home house houseplant indoor interior juice juicy key leaves milk nature ornamental perennial pillarshaped plant plants prickly room selective serpentine small spikes sprout spurge stem succulent tall thorns tree triangular trihedral tropical unpretentious white window