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Margaret R. Pooler

The U.S. National Arboretum has been an active member of the North America China Plant Exploration Consortium (NACPEC) since its first expedition in 1991. These trips have contributed to knowledge about the taxonomy and botany of Chinese plants as

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Stan C. Hokanson, Steven McNamara, Kathryn Zuzek, Mike Zins, and Nancy Rose

plants are selected to be capable of surviving winter cold events in U.S. Department of Agriculture (USDA) Plant Hardiness Zone 4 (–20 to –30 °F; –28.9 to –34.4 °C) landscapes ( U.S. Department of Agriculture, Agricultural Research Service, 2012

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Neil C. Bell and James Altland

-known in the northwestern U.S. and is popular for its magenta flowers and long bloom period. C . × obtusifolius forms a near-perfect dome of foliage and would make an excellent substitute for C . × hybridus , which is the standard white-flowering Cistus

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Dale T. Lindgren and Daniel M. Schaaf

.6 to 7.8. sd s are included as a measure of variation in Tables 1 and 2 . The measurements in the text are from Canby, OR, and no sds or ranges were provided. Table 2. Comparison of traits for ‘Dark Towers’ and ‘Husker Red’ at North Platte, NE, in

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Margaret R. Pooler

spring blooms. Ornamental camellias first arrived in the United States in the late 1700s in Hoboken, NJ, and were initially grown in greenhouses in the northeastern United States as a nursery and florist crop ( Brown, 1978 ). By the early 1900s, camellias

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Joshua K. Craver and Kimberly A. Williams

Bloom’s taxonomy, Krathwohl (2002) stated that higher cognitive processes, such as evaluating and creating, are often considered the more important and long-lasting fruits of education. Cannon and Feinstein (2005) furthered this idea as they divided

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Lisa W. Alexander, Anthony Witcher, and Michael A. Arnold

U.S. National Arboretum’s McMinnville, TN worksite, which is located at the Tennessee State University Otis L. Floyd Nursery Research Center. Hamamelis virginiana ‘Sunglow’ was selected for its upright habit, large, profuse blooms, continued bloom

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Sandra B. Wilson, Carlee Steppe, Zhanao Deng, Keri Druffel, Gary W. Knox, and Edzard van Santen

entirely open flowers, peak bloom) among U.S. varieties and 3.5 (a few open to mostly open flowers) for Australian trailing lantana (data not presented). Within the first 4 weeks, regardless of variety, plants had few to many open flowers in central Florida

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Margaret Pooler and Hongmei Ma

Ornamental flowering cherry trees are popular plants for street, commercial, and residential landscapes. Grown primarily for their spring bloom, flowering cherries have been in the United States since the mid-1850s ( Faust and Suranyi, 1997 ), and

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Chandra S. Thammina, David L. Kidwell-Slak, Stefan Lura, and Margaret R. Pooler

Redbud ( Cercis L. spp., Fabaceae: Caesalpiniodeae: Cercideae), are popular ornamental small trees or shrubs valued commercially for their showy early spring bloom, heart-shaped leaves, and adaptability to diverse environmental conditions. Each