abundant angles appearances castor-beans castor-oil castor-oil-plant castor-seeds cluster clusters common cotyledons Euphorbiaceae fast-growing flower flowers foliage highly-toxic inflorescences invasive large large-leaves leaf leaves medicinal palm-of-Christ palma-Christi poison poisonous ricinus-communis seed-pods seedhead shrub shrubbery spiky-green-seed-capsule spiny surface surfaces textured textures toxic toxins vegetation wasteland-weed weed widespread color colored colorful colors colour coloured colourful colours contrast contrasting covered walkways decorative designed distinctive elements external ferns flora garden green greenery light path peace peaceful perspectives plants quality shade shadows shapes shrubs Sizes style styles sunlight sunshine swimming-pool trees variety views wall Arecales botanical-garden clipped cut daylight display edges edging evergreens gardening grass groundcover growth hedges landscaping levels palms pruned pruning rows shaped shaping suburban suburbs topiary trimmed urban accommodation architecture bridge business-complexes city cultural culture decorations dome domed height high highrise modern New pink Singapore skyline towering towers tropical variation