Cactus  (Ariocarpus trigonus)

This striking cactus is only visible from its claw-like tubercles that emerge through the soil; the majority of the stem remains hidden underground (2). Unusually amongst cacti, the yellow-green plant is spineless, lacking areoles on the smooth upper surface of the tubercles (2). Lemon-yellow flowers emerge in a ring on the crown of the stem and when fertilised these develop into small white berries (5).