Desert Coreopsis. Coreopsis bigelovii, Aster or Sunflower Family also known as the Composite Family: ( Compositae ), Desert Coreopsis: Also Called: Leptosyne bigelovii, Bigelow Coreopsis, Bigelow's Tickseed. We wish to thank Wikipedia, the free encyclopedia for some of the information on this page. We share images and information with Wikipedia. Quick Notes: Height: Up To 1 to 1 1/2 feet tall.. 1 to 1 1/2 feet wide. Flowers: Yellow, flower heads appear at the ends of 12 - 18 inch light green stems. Flowers are composed of 8 to 10 rays. Blooming Time: March to May. Leaves: Oblong to oblanceolate gray-green leaves up to 3 inches long. Found: The USDA claims it is native to the USA (CA). The plant is found from the southern California Coast Ranges, southwestern Sierra Nevada, Transverse Ranges, and the Mojave and Colorado Deserts. Elevation: 0 - 5,000 feet. Hardiness: 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) USDA Zone 10b: to 1.7 �C (35 �F) Soil pH requirements: 6.1 to 6.5 (mildly acidic) 6.6 to 7.5 (neutral) 7.6 to 7.8 (mildly alkaline) Sun Exposure: Full Sun Partial Shade Habitat: Desert Gravelly Slopes, Creosote Bush Scrub, Joshua Tree WoodlandS, Pinyon-Juniper WoodlandS, Foothill Woodlands. Miscellaneous: Flowering Photos Taken May 5, 2008. In The Phoenix, Arizona Desert Botanical Garden. Great xeriscape plant.

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