Leucophyllum zygophyllum

{{Short description|Species of plant}}

{{Speciesbox

| image = 201016 101 San Diego Botanic Garden - Waterwise Landscape, Leucophyllum zygophyllum Cimarron® Texas Ranger, pretty much finished blooming for this season.jpg

| image_caption = 'Cimarron' cultivar

| image2 = 201016 098 San Diego Botanic Garden - Waterwise Landscape, Leucophyllum zygophyllum Cimarron® Texas Ranger.jpg

| image2_caption = At San Diego Botanic Garden

| genus = Leucophyllum

| species = zygophyllum

| authority = I.M.Johnst.

}}

Leucophyllum zygophyllum, the blue ranger or blue rain sage, is a species of flowering plant in the family Scrophulariaceae, native to northeastern Mexico.{{cite POWO |id=139199-2 |title=Leucophyllum zygophyllum I.M.Johnst. |access-date=16 February 2023 }} A shrub with attractive opposite foliage and a habit of flowering before rainstorms, it is recommended for xeriscaping.{{cite web |url=https://www.public.asu.edu/~camartin/plants/Plant%20html%20files/leucophyllumzygophyllum.html |title=Scientific: Leucophyllum zygophyllum |author= |date=2023 |website=public.asu.edu |publisher=Arizona State University |access-date=16 February 2023 }} It is highly heat and drought tolerant, and is cold hardy to USDA zone 8a. There is a cultivar, 'Cimarron', which is somewhat dwarfed, reaching {{cvt|3|ft|m|0}}.{{cite web |url=http://www.txsmartscape.com/plant-search/plant-details.php?id=951 |title=Texas Sage, Cimarron |author= |date=2023 |website=Texas SmartScape |publisher=North Central Texas Council of Governments |access-date=16 February 2023 }}