| Picture | Plant Name | Botanical Name | Plant Description |
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| Desert Zinnia | Zinnia grandiflora | Small, low-growing perennial native to the southwestern United States in some of the most inhospitable locations. Prefers full sun and well-drained soil. Dark yellow flowers make this an attractive plant for any water-wise landscape. Comes out of dormancy in summer so be patient. |
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| Fire Chalice | Zauschneria californica | Upright, weakly spreading herbaceous perennial native to the western United States. Dark-green lance-shaped foliage is slightly fuzzy. Bright orange tubular flowers bloom throughout the summer. Performs well with very little water. Some of the specimens in our garden receive no additional moisture. Attracts hummingbirds. |
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| Green Vase Zelkova | Zelkova serrata 'Green Vase' | Large, vase-shaped, deciduous tree. Upright ascending branches are similar to those of the American Elm. Dark green, narrowly ovate, toothed leaves turn bronze red in the fall. Narrow branch structure may require some corrective pruning to avoid problems. Requires very little water once established. |
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| Hummingbird Trumpet | Zauschneria arizonica | Clump-forming Arizona native perennial. Reddish orange flowers bloom throughout the summer and until frost. Hairy, gray-green, lance shaped leaves cover arching stems. Best planted in the spring to allow establishment before the winter. Requires no additional water once established but will handle a little extra water. |
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| Japanese Zelkova | Zelkova serrata | Large deciduous tree with a vase-shaped form similar to an elm. Dark green leaves are ovate has serrated edges and turn orange, red and yellow in the fall. Branches grow close together and will require early pruning to promote a desirable shape. Tolerant of many soil types and drought. |
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| Orange Carpet Fire Chalice | Zauschneria californica subsp. garrettii 'Orange Carpet' | Low-growing herbaceous perennial. Plant Select winner for 2001. Unlike other hummingbird flowers, this one is more compact. Bright red-orange tubular flowers bloom throughout the summer. Attracts hummingbirds. Requires moderate amounts of water. Good choice for planting over rock walls. |
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| Village Green Zelkova | Zelkova serrata 'Village Green' | Tall, vase-shaped deciduous tree somewhat resembling an elm. Dark-green simple leaves have serrated edges and turn a bronze-red in the fall. Branching can be a problem if they are growing to closely to the central leader. Problems with branching can be solved by care during purchasing and early pruning. Tolerant of urban conditions and drought. Due to its form and roots it makes an excellent street tree. |
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| Zagreb Coreopsis | Coreopsis verticillata 'Zagreb' | Nice medium growth rate, long blooming, low maintenance plant. Delicate flowers cover the plant the entire summer. Better resistance to powdery mildew than other coreopsis. A good choice for the Wasatch front as it comes out dormancy earlier. |
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| Zebra Grass | Miscanthus sinensis 'Zebrinus' | Clump-forming ornamental grass with horizontal bands along the leaf blades. Long linear leaves grow up to 8 feet tall. Highly ornamental pinkish-white clusters of flowers bloom in late-summer to fall and last throughout the winter. Grows in a wide range of soils. Cut back in late-winter or early-spring before any new growth appears. |
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| Zing Rose Dianthus | Dianthus deltoides 'Zing Rose' | Broad, mat-forming perennial with bright rose-red flowers that bloom in late-spring. Grayish green leaves are very narrow. Prefers to grow in part shade. |