noun
cocklebur; Xanthium strumarium
A common weed with spiny burs that stick to clothing and animal fur. The plant is widely known in Japan, and the name is often used in katakana.
秋になると、オナモミの実が服にくっつく。
In autumn, cocklebur fruits stick to your clothes.
オナモミは道端によく生えている。
Cockleburs often grow by the roadside.
The Japanese name オナモミ is of uncertain origin. It may be related to the plant's bur-like fruits, but the exact derivation is unclear.