mono (monochrome): in one colour or different tones of this, or in black and white only
Speckled WoodGrevy's ZebraCalla Lily - BWGeum RivaleHydrangea Macrophylla Glowing EmbersIrisKniphthoriaRudbeckia seed headsShadowsSunlit grassesZantedeschia - MonoPlant supports against a flint wallPen Mill Jetty