angles appearance blue branch branches branching Cacti cactus clusters columnar edges flora frilled frills fruit fruiting garden-display green green-fruit height high irregular large leaf light long multiple-branched perennial points prickles Prickly protection ribbed ribbing shade shadows shapes sharp sky spikes spines succulent sunlight sunshine surface surfaces tall textures Unripe unusual coloring colors colouring colours dangerous display fine flowering garden garden-plants pointed protective risks shape skin soft-wooded-perennial spination spiny texture to-the-point