top view seed of castor oil plant on branches (ricinus communis) with sky background,close-up a bunch green seeds coated

flower color communis castor bean ricin medicine agriculture leaf ricinus close green poisonous fruit dangerous poison oil farm tropical toxic botany euphorbiaceae danger pod plant closeup natural medicinal detail garden medical shrub pharmaceutical nature bloom white exterior background red eco decorative isolated seed biodiesel outdoor alternative energy herbal top view branches sky backgroundclose-up bunch seeds coated