Palo Verde Trees. Hybrid 'Desert Museum'. Parkinsonia X Desert Museum, Used To Be Pea Family ( Leguminosae ) Now Called ( Fabaceae ), Palo Verde Hybrid 'Desert Museum'. Its Parent Plants Are Also Called: Jerusalem Thorn, Jelly Bean Tree, Mexican Palo Verde, Retama, Horse Bean. We wish to thank Wikipedia, the free encyclopedia for some of the information on this page. We share images and information with Wikipedia. This hybrid was discovered and developed by Mark Dimmitt at the Arizona-Sonora Desert Museum in Tucson, Arizona. Believed to be a natural hybrid of Parkinsonia aculeatae, Cercidium floridum, and Cercidium microphylum, it combines the desirable characteristics from the three parent trees. Very popular due to its thornless characteristics. Not easy to find in nurseries. The natural occuring Parkinsonia aculeatae has very sharp thorns. Quick Notes: Height: Up to 20 - 30 feet tall and up to a 30 foot spread. Trunk: 3 to 12 inches in diameter. Bark: Very smooth green thornless. Flowers: Bright yellow with five petals, pistils may be red - brown. 4 - 5 flowers in a cluster less than 2" long; covering the tree in spring, sometimes again in late summer. Yellow flowers in the spring. Upper flower petal often bears orange dots. Blooming Time: Mid March - April and again in June through August. Seed Pod: Few, if any, seed pods. Containing usually about 3 seeds that are sterile. Seeds: Smooth hard seeds are only slightly flattened with 2 to 7 found in each pod. Leaves: Leaves are bipinnately compound, in pairs, about 1/2in long with leaflets of 1/4 to 1/8in; often leafless most of the year, normally each fork bearing 1-3 pairs of smooth, tiny leaflets, that are shed in early summer. This is in contrast to Foothills Palo Verde which usually has 4 or more tiny leaflets. Found: A hybrid. Parents are native of the Sonoran and Chihuahan Deserts of the southwestern United States (western Texas, southern New Mexico southern Arizona), and northern Mexico in Sonora, & Chihuahua. Elevation: Below 2,500 feet. Hardiness: Will not survive below 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) USDA Zone 11: above 4.5 �C (40 �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 Habitat: Xeriscape landscaping.. Miscellaneous: Photos Taken At April 23, 2008. Phoenix Desert Botantical Garden. A low water use landscaping plant in the Phoenix and Tucson areas.

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