barometer bush
Definition of barometer bush
: a compact evergreen shrub (Leucophyllum frutescens of the family Scrophulariaceae) native to Texas and adjacent northern Mexico that has grayish-green hairy leaves and solitary, bell-shaped, usually pink or purple flowers Hope bloomed on those hardy plants, known to old-timers as barometer bushes because showers trigger their flowers. — Tracy Hobson Lehmann, San Antonio Express-News, 9 July 2011 —called also cenizo, Texas sage
From the M-W Editors
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1957
First Known Use of barometer bush
1957
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