Leucophyllum frutescens

The solitary axillary flowers are bell- or funnel-shaped, with five lobes and two lips.

[3] Texas sage is a popular ornamental plant, commonly used for edge and area plantings in warmer and drier areas; it requires minimal water, is easily shaped into hedges, and blooms over the entire surface.

[6] Texas sage is nicknamed the "barometer bush" due to a commonly held belief that it can predict the rain.

According to folklore, the plant goes into bloom in anticipation of upcoming rain.

It appears that the plant sometimes blooms because of humidity or low atmospheric pressure, which can occur before or after rain.

Ornamental Texas sage in bloom
Texas sage