The word "boll" refers to the round and fluffy part of a plant, usually containing seeds, such as the cotton boll or the seed capsule of various plants.
I never would have thought to combine cotton bolls with magnolia leaves — genius! (stonegableblog.com)
Later, comparing samples of multiple species of rice grown in numerous regions around the world, he found arsenic levels almost universally elevated, including in the U.S. Notably, much of the U.S. rice crop is grown in regions of the South where the soil is contaminated by old arsenic - based pesticides, once used by farmers to protect cotton crops from boll weevils. (discovermagazine.com)
I never would have thought to combine cotton bolls with magnolia leaves — genius! (stonegableblog.com)