Lavender-leaf Sundrops. Calylophus lavandulifolius, Evening Primrose Family ( Onagraceae ), Lavender-leaf Sundrops. Also called: Lavender-leaf primrose, Lavenderleaf sundrops, Calylophus hartwegii var. lavandulifolius, Galpinsia lavandulifolia, Oenothera lavandulifolia, Calylophus lavandulifolia. We wish to thank Wikipedia, the free encyclopedia for some of the information on this page. We share images and information with Wikipedia. Lavender-leaf Sundrops is a low, mound-forming perennial groundcover. It is about 8 inches tall by 10 inches wide. Its stems and leaves are green - grayish with a dense velvety pubescence. When it blooms its bright yellow flowers are 1 to 2 inches wide, with four, fringed petals. Quick Notes: Height: Up To 8" tall, and up to about 10 inches in diameter. Flowers: Alternate, simple, sessile, numerous, crowded, linear to narrowly lanceolate, 1/4 to 2 inches long and less than 1/4 inch wide, somewhat ascending, appressed green-gray-hairy; margins entire; tips pointed to rounded. With stems that are decumbent to ascending, few to many, usually branched, densely appressed gray-hairy. Flowering Time: April - September. Fruits: Capsules, narrow, cylindric, 1/2 to 1 inch long, 4-angled, gray-hairy; seeds many and small. Leaves: The leaves are bright, evergreen lance-ovate, egg-shaped, or heart-shaped, simple leaves, and up to 12" long. The stems and leaves are covered with hairs. Found: Native to Southwestern USA. 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) 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: 4,300 - 7,600 Feet. Habitat: Dry rocky, hillsides and ledges, stream valleys, roadsides, disturbed ground, ponderosa forest clearings, and open wooded hillsides. Miscellaneous: Flowering Photos Taken September 19, 2006. Near Holbrook, Arizona. A good xeriscape plant.

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