Leaves are green, twice-pinnately compound, 1/2" to 3/4" long with one to three pairs of small, narrowly obovate pinnae. Parkinsonia (Cercidium) Hybrid 'Desert Museum' ... Blooms. Credit: Emily Green. Large yellow blossoms in spring with possible rebloom in summer. Common Name. Drought tolerant once established. Palo verde trees bloom outside Los Angeles Police Department headquarters. Desert Museum Palo Verde Parkinsonia x 'Desert Museum' This hybrid tree has three parents, Parkinsonia microphyllum, Parkinsonia floridum, and Parkinsonia aculeata. A bee scrambles over a Desert Museum flower at Tree of Life Nursery in San Juan Capistrano. Fast. They bloom from spring to fall and are great for attracting hummingbirds. Known for a long bloom season, its attractive yellow flowers emerge profusely in the spring and repeat intermittently throughout summer. Botanical Name Cercidium Desert MuseumAlso Known As Parkinsonia x 'Desert Museum'SpecificationsPlant Type Native From USDA Zone Light Needs Watering Needs Leaves Life Cycle Avg. Fast growth rate. Keep the classic shape of the palo verde by cutting it back in the summer. This thornless hybrid exhibits qualities found in Cercidium floridum, Cercidium microphyllum, and Parkinsonia aculeata. It is also illegal; this tree is protected in both Sonora and Arizona. Cercidium 'Desert Museum' LOW BRANCH Palo Verde. Light Needs. Prune the tree in the summer. Grows to be 30 feet tall by 40 feet wide. Parkinsonia aculeata. Gardening in Tucson, Phoenix, Arizona and California. Mature Size: 20-30' high and 20-40' wide. Because of this and their slow growth rate, it is no longer ethical to burn desert ironwood. Growth Rate: Fast Foliage: Green Flower: Yellow Water Usage: Low. This results in a fuller, vibrant yellow flower display with brighter green, thornless trunks, which is why the Museum Palo Verde is fast becoming one of the most popular shade trees in landscapes throughout the Western United States. Water Needs. Scientific Name. English names: Mexican palo verde, Jerusalem thorn, retama Spanish names: bagote, junco marino, cacaporo, guacóporo, retama, palo verde, mezquite verde, espinillo Requires well-drained soil. Growth Rate. Palo verde trees are extremely drought-tolerant and they don't need any additional water after they are planted. Watering plants near the Mexican palo verde, which grows in USDA zones 9 through 11, can lead to faster, fuller growth, but the blue palo verde varieties, which grow in USDA zones 8 through 11, can't tolerate the extra water. Under-watering causes the tree to lose its flowers. Upright. The varieties of Palo Verde, the (genus: Cercidium), the variety that is one off the faster to grow is the Sonoran Palo Verde, and also the Hybrid Palo Verdeâs, like the desert museum or the Sonoran Emerald Palo Verde. Trunk and stems remain green after leaves fall. A hybrid selection of an Arizona/Sonoran Desert native, Desert Museum Palo Verde is an excellent choice in the waterwise landscape. Over-watering can result in weak branches. The palo verde Desert Museum seen in winter in the courtyard of the Valley Performing Arts Center at Cal State Northridge. Desert Willow (Chilopsis linearis) A smaller tree with gorgeous pink flowers. Unlike most other palo verde trees this tree is thornless and has a longer blooming period with somewhat larger flowers. Desert Museum Palo Verde . Fast growth rate. Growing Cercidium hybrid: Hybrid Palo Verde / 'Desert Museum' in hot, dry climates and Arizona and California. Desert Museum Palo Verde is a fast-growing tree that is semi-deciduous or drought deciduous. The Desert Museum palo verde tree is a drought-tolerant tree, so be careful not to over-water. ... Growth rate: Moderate to rapid depending upon water. The different varieties of the Mesquite: With the one to grow the fastest being the Argentine Mesquite (Prosopis Alba). This specimen has a straight, central trunk with branching starting closer to the base of the plant. Growth Habit. Deciduous tree. Spring. Bark is smooth and green. Average Landscape Size. Desert Museum Palo Verde. Back To Plant Search USDA Hardiness Zone. Credit: Jamie Rector / For The Times. The Museum Palo Verde is actually a hybrid of different, older Palo Verde species that brings the best qualities of each. 25' x 25' Care Information.