bad blue-gray blue-grey citrus citrus fruit danger dangerous deterioration discolor discoloration discolour food fruit fungi growing growth mold moldy mottled mould mouldy off orange raised rotten rotting skin surface texture unhealthy blessed thistle carduus crispus carduus nutans carline thistle cirsium discolor cirsium helenioides cirsium heterophylum cnicus benedictus cotton thistle fade faded field thistle golden thistle melancholy thistle musk thistle nodding thistle onopordon acanthium onopordum acanthium thistle weed