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sleepy grass

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Definition of sleepy grass

: a tall coarse grass (Stipa robusta) of the southwestern U.S. and northern Mexico that causes a deep sleep in horses or sheep that feed on it

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“Sleepy grass.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sleepy%20grass. Accessed 1 Mar. 2021.

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