Mock Pennyroyal. Hedeoma oblongifolium, Mint Family ( Lamiaceae ), Mock Pennyroyal. Also called . We wish to thank Wikipedia, the free encyclopedia for some of the information on this page. We share images and information with Wikipedia. An annual, dicot, herb; with numerous erect branches. Arizona Pennyroyal is a sub - species member of the mint family known by the common name of Pennyroyal. Hedeoma contains a pungent oil said to be a repellent to insects, especially to fleas. Pennyroyal is a native of most parts of Europe and parts of Asia. It was highly prized for it's medicinal uses. We do not recommend using this plant as a medicine. Quick Notes: Height: Height to about 12 - 20 inches. Flowers: The plant has small bluish or rose purplish flowers in the leaf axils. They have a white throat with purplish stripes. Flowering Time: March - September. Leaves: Small bright green, oval, opposite, stalked leaves about half-inch long. Found: Found in southwestern Arizona, California, and Sonora Mexico. Hardiness: USDA Zone 3a: to -39.9 �C (-40 �F) USDA Zone 3b: to -37.2 �C (-35 �F) USDA Zone 4a: to -34.4 �C (-30 �F) USDA Zone 4b: to -31.6 �C (-25 �F) USDA Zone 5a: to -28.8 �C (-20 �F) USDA Zone 5b: to -26.1 �C (-15 �F) USDA Zone 6a: to -23.3 �C (-10 �F) USDA Zone 6b: to -20.5 �C (-5 �F) USDA Zone 7a: to -17.7 �C (0 �F) USDA Zone 7b: to -14.9 �C (5 �F) USDA Zone 8a: to -12.2 �C (10 �F) USDA Zone 8b: to -9.4 �C (15 �F) USDA Zone 9a: to -6.6 �C (20 �F) USDA Zone 9b: to -3.8 �C (25 �F) Soil pH requirements: 5.6 to 6.0 (acidic) 6.1 to 6.5 (mildly acidic) 6.6 to 7.5 (neutral) 7.6 to 7.8 (mildly alkaline) 7.9 to 8.5 (alkaline) Sun Exposure: Full Sun Elevation: 1,800 - 8,000 Feet. Habitat: Desert Washes, Streams, Woodlands. Miscellaneous: Flowering Photos Taken April 21, 2009. Near Tortilla Flat, Arizona.

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