Lepechinia ganderi is a rare species of flowering plant in the mint family known by the common name San Diego pitcher sage. It is known from only a few populations in northern Baja California and southern San Diego County, California, where it grows in the chaparral of the Peninsular Ranges. This is an aromatic shrub with slender branches coated in rough hairs and resin glands. The leaves are lance-shaped and sometimes have toothed edges. The raceme flower cluster bears flowers on short pedicels. Each flower has a base of long, pointed sepals below a white to light lavender tubular corolla. The flower is lipped at the mouth. The small, dark, hairless fruit develops attached to the sepals once the corolla falls.