Heuchera brevistaminea is a rare species of flowering plant in the saxifrage family known by the common name Laguna Mountains alumroot. It is endemic to the Laguna Mountains of San Diego County, California. It grows in rock crevices and steep cliffsides in the chaparral. This is a rhizomatous perennial herb producing an inflorescence up to 25 centimeters tall. The flowers are bright pink or magenta.