Monardella douglasii is a species of flowering plant in the mint family known by the common name Douglas' monardella.
Monardella douglasii is endemic to northern California, where it is known from several of the Inner Southern California Coast Ranges, including the Diablo Range, and nearby valleys of the southern San Francisco Bay Area.
Monardella douglasii is a hairy annual herb producing a branching purple stem up to about 30 centimeters tall. The oppositely arranged leaves vary in shape.
A former subspecies, Monardella douglasii ssp. venosa (veiny mondardella), has been reclassified as Monardella venosa. 
- Calflora Database: Monardella douglasii (Douglas' monardella)
- Jepson Manual eFlora treatment of Monardella douglasii
- USDA Plants Profile
- Monardella douglasii − Photo gallery
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