Abstract
Registration of cultivar names of woody ornamental plants in North America (exclusive of roses, fruits, and nuts) began in 1948 under the auspices of the American Association of Nurserymen (AAN). In 1959, Arnold Arboretum assumed responsibility for the registration of woody ornamental cultivars that had not been assigned to other registration authorities. In 1980, the International Society for Horticultural Science appointed the American Association of Botanical Gardens and Arboreta (AABGA) as North American Coordinator for the International Registration Authority for cultivar names of unassigned woody ornamentals and for National Registration authorities in the United States and Canada. Arnold Arboretum (1959–1980), the U.S. National Arboretum (1981-1984), and Longwood Gardens (1984–present) have served as International Registration Authorities for cultivar names of unassigned woody ornamentals.
Colorful baskets of flowering annuals are popular with home gardeners, but these containerized plants require frequent waterings. Mulching of field soils is a proven way to conserve soil moisture. This study was conducted to see if mulching would reduce the need to irrigate containerized plants. Adding either pine bark or sphagnum moss mulch to potted `Impulse Rose' impatiens (Impatiens wallerana) plants reduced the frequency of irrigations when the plants were small and had not yet reached canopy closure. Mulching had no effect on plant height or flowering.
practices at the Katherine Dulin Folger Rose Garden to the life cycle of a monarch butterfly at the Butterfly Habitat Garden. Other chapters review a zoo display, native American landscape, French-inspired royal parterre, and a victory garden, to name a few
In 1995, the SFA Arboretum initiated a “three Rs”—rescue, research, and reintroduction—endangered plants program, a conservation horticulture strategy that links the Arboretum with the goals of the Texas Parks and Wildlife, U.S. Fish and Wildlife, and other conservation agencies. The program includes two tiers of activity: 1) a 1-acre endangered plants theme garden in the SFA Arboretum for germplasm studies and educating the public, and 2) “introduction” research plots at Mill Creek Gardens, a 119-acre conservation easement 6 miles west of Nacogdoches, Tex. This paper reports on an “introduction” study of one of the most endangered endemics in East Texas, the Neches River rose mallow, Hibiscus dasycalyx. A randomized complete-block design with three blocks and four plants per replication was established in Dec. 1995, in a full-sun wetland planting at Mill Creek Gardens. Two mulching regimes (with and without) and four rates of slow-release 13-13-13 were applied at planting and again in Mar. 1996. Data collected in 1996 and 1997 included number of stems, flowering, and the weight of all aboveground growth harvested after the first frosts in both years. After 2 years, 1) 80% survival across all treatments with losses primarily in the wettest portions of the plots, 2) mulch influences are nonsignificant, and 3) plant response to slow-release fertilizer is significant with medium and high rates favored for “at-planting” application.
. These hybrids were released from 1962 until his death in 1991, and posthumously for many years thereafter ( Minot, 2019 ). Reiman Gardens at ISU grows 93 Buck roses in their display garden, and they recognize a total of 102 Buck roses ( American Public
production of 18 billion cut stems, 60 to 80 million potted roses, and 220 million roses for landscape uses ( Blom and Tsujita, 2003 ; Pemberton et al., 2003 ; Roberts et al., 2003 ). In the United States, 36.6 million garden rose bushes are produced
killing them. By contrast, RRV is currently killing large numbers of garden roses and threatening the future of the garden rose industry ( Byrne et al., 2015 ; Windham et al., 2014 , 2016 ). The disease complex has three important biological components
Bare-root garden rose' (Rosa) cultivars Show Biz, Tropicana, Hotel Hershey, and Femme were packaged according to standard nursery practice with roots surrounded by peat. After 4 weeks of simulated marketing at 23C, the plants produced half as many breaks, half as many flowers, half as much seasonal cane growth, and had reduced survival when field-grown for 1 year, compared to plants held 4 weeks at 3C. Waxing of canes before treatment reduced water loss during simulated marketing and increased lateral breaks, total season cane growth, and, in some cases, flower production. Waxing also induced faster development of new lateral breaks, but, at 23C, induction occurred before planting and these breaks survived poorly in the field. The antitranspirant Cloud Cover did not affect moisture loss or improve field performance.
Botanic gardens, Cooperative Extension, and land grant universities share a common goal of horticultural or plant science education. Many botanic gardens include education in their mission statements. While academic institutions typically offer
Hibiscus dasycalyx is known from less than 10 locations along the Neches River. A many-stemmed, woody-based, narrow-leafed perennial to 4 ft, the species displays showy white-petaled, 3-inch blooms in summer and fall. The species is federally endangered due to loss of habitat and interspecific hybridization with the Soldier Rose Mallow, Hibiscus militaris, a species that encroaches into the range of the Neches River Rose Mallow. A 1994 seed propagation study included nine collection dates (late July to late October) and stratification at 0, 2, 4, and 6 weeks prior to planting. Germination percentages were low; only the 7/22 and 9/10 collection dates exhibited a germination rate above 25% and stratification did not improve germination percentages. In late Fall 1994, container-grown plants exhibited an almost universal tendency to enter dormancy in a greenhouse maintained above 70F and provided with long-days via supplemental lighting. In two cutting propagation trials, cuttings collected 8/23 rooted at 65%; a 11/22 cutting collection failed to root. Seedling variation in leaf shape and growth rate is high. The results of 1995 cutting propagation trials will be presented. A reintroduction strategy for the species under the umbrella of the Stephen F. Austin State Univ. Arboretum includes establishing a sustainable planting of the species in the Arboretum and reintroduction into Mill Creek Gardens, a Nacogdoches county conservation easement.