purpletop

1 of 2

noun (1)

variants or less commonly purpletop grass

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

purple-top

2 of 2

noun (2)

variants or less commonly purple-top wilt

: 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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