Alliaria petiolata Annual plant blossom blossoms flower flowering plant garlic garlic mustard grass green groundcover hedge garlic Jack-by-the-hedge leaf leaves mustard nature petal plant shrub spring subshrub Terrestrial plant white abstract biology Capsella Capsella bursa-pasto embryo enlargment family Brassicaceae magification micro microscope seed Shepherd's-purse countless Evergreen candytuft flowers Goldenrod many mimosa Mustard plant plants structure structures texture textures white blossoms yellow agriculture bloom clouds colorful field harvest heaven horizon.autumn landscape mustdard plains sky sunshine walk