purpletop

noun (1)
variants: or less commonly purpletop grass

Definition of purpletop

 (Entry 1 of 2)

: a sticky grass (Triodia flava) of the eastern U.S. with purple panicles

purple-top

noun (2)
variants: or less commonly purple-top wilt

Definition of purple-top (Entry 2 of 2)

: an insect-transmitted and often fatal disease of potato plants caused by the same virus that produces aster yellows and characterized by a purplish or chlorotic discoloration of the top shoots, swelling of axillary branches, and severe wilting

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“Purpletop.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/purpletop. Accessed 6 Mar. 2021.

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