Scalloped Leaf Phacelia. Phacelia crenulata, Waterleaf Family ( Hydrophyllaceae ), Scalloped Leaf Phacelia. Also called Scorpionweed, Common phacelia, Caterpiller Weed, Notch-Leafed Phacelia, Crenate Phacelia, Cleftleaf Wild Heliotrope, and Scalloped Phacelia. We wish to thank Wikipedia, the free encyclopedia for some of the information on this page. We share images and information with Wikipedia. Phacelia crenulata is a species of phacelia native to the southwestern United States and northern Mexico. Quick Notes: Height: Up To About 18 Inches Tall. Flowers: Flowers violet-purple, bell-shaped with 5 rounded lobes to 1/4" wide. The flowerhead is finely haired, with terminal coils. Flowering Time: Mid February - May. Leaves: Leaves simple, lobed, dark green, to 5" long. Stems sticky. When crushed, folliage has strong, onion-like smell. Found: Native of most parts of Arizona, California, & Northern Mexico. Hardiness: 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) USDA Zone 10a: to -1.1 �C (30 �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: Can be found from 0 - 4,000 Feet. Habitat: Phacelia's habitat is the desert environs, where it occupies open, sandy washes to rocky flats, bajadas, roadsides, and playas. Miscellaneous: Flowering Photos Taken April 25, 2005. Near Lake Pleasant, Arizona.

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