beam biology botany cell corn culm food haulm magnification maize microscope plant stalk ammonite ancient cephalopod chambers creature Crustacean crystals evolution extinct fossil mollusk nautilus rock sea shell abstract Capsella Capsella bursa-pasto embryo enlargment family Brassicaceae magification micro mustard seed Shepherd's-purse blue boats Buidings clouds hills hotels houses Ibiza land landscape moutains port resort rooftops scene scenery town bean Bell Bean Broad Bean Faba Bean Fava Bean Field Bean Tic Bean Vicia faba alligator pear avocado avocado pear black butter pear climacteric fruit cultivar egg-shaped fertility fruit firm fruit green guacamole Hass variety healthy large berry large seed nutritious ovate pebbled skin perennials persea americana ripe rough soft tree wrinkled