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 blade cut cutting mat green grid knife lines mat measure object objects pattern scalpel texture tool tools trim work workplace background corrode corrosion industrial lettering metal numbers oxidation oxide paint pipe rust type urban wabi sabi wabisabi water pipe erode erosion gouge grunge industry old scratch wear worn abstract abundance aromatic bulk caraway seeds cooking elongated food plenty quantity ribbed seeds shapes size spices wallpaper appearance backdrop building city column concrete design designed external gray grey historic layered layers levels patterned strength strong structure style support support column wall