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The Wister Rhododendron Garden is one of the largest collections of hardy elepidote rhododendrons in North America. Initiated in 1953, the collection represents the culmination of a life's work by one of the leading Rhododendron breeders in the United States, Dr. John Casper Wister.


The Trillium Collection in the Holmes Trillium Garden at the Huntsville Botanical Garden has achieved Plant Collections Network (formerly NAPCC) Accreditation. The collection of 28 Eastern US species and over 200 selected forms and cultivars is displayed throughout the garden. Further measures are being taken to safeguard this flagship collection, transfer critical documentation, and develop interpretive materials to maximize its educational value. 

Penstemon - Western US

Idaho Botanical Garden was recently awarded provisional status for our Penstemon collection by the Plant Collections Network (formerly North American Plant Collections Consortium, NAPCC).  In North America, recognition by Plant Collections Network confers national status for public garden plant collections.  It is a joint program of the American Public Gardens Association and the U.S.


Green Spring Gardens is a 27-acre garden in Virginia’s Fairfax County that maintains 22 demonstration gardens with a wide range of annuals, perennials and woody plants that comprise approximately 5000 taxa.


Three of the Chicago Botanic Garden’s specialized collections have been accepted as collections of the Plant Collections Network (formerly North American Plant Collections Consortium, NAPCC): Geranium, Quercus, and Spiraea. The Plant Collections Network works with North American public gardens to preserve taxa of plants in living collections through a network of public gardens. It also works to improve curatorial practices.


Fullerton Arboretum was founded in 1979 on the campus of the California State University, Fullerton in North Orange County as a joint project between the California State University system and the City of Fullerton Redevelopment Agency. The Arboretum was designed to occupy the land that once held the remnants of the Gilman Ranch, the first commercial orange grove in the area. In 1875, Richard H. Gilman planted an orange grove with Valencia oranges and named his farm the Semi-Tropic Fruit Ranch.


At the Chicago Botanic Garden, Spiraea was selected as a specialty collection for its adaptability to the soils and climate of the Chicago Botanic Garden. Overall, Spiraea is a small shrub that grows in limited spaces of urban and suburban lots, is low cost, and has good resistance to insects and diseases. Spiraea is valuable in landscapes because many species bloom in late spring and early summer when few other woody plants are in bloom.


The JC Raulston Arboretum has been growing Cercis since 1978, building a significant Collection of broad taxonomic diversity. The mild temperate climate where the arboretum is located in North Carolina allows all presently described species and cultivars in the genus to be grown. The Arboretum's recently completed master plan designates a prominent location for the Cercis Collection, as well as additional sites for featuring individual specimens in Plantman's Woods and Asian Valley.


Fort Worth Botanic Garden has achieved Plant Collections Network (formerly North American Plant Collections Consortium, NAPCC) accreditation for its Begonia family (Begoniaceae) Collection. Comprised of 1,001 taxa, including 718 cultivars, it is the largest public collection of its kind in the United States. The Botanic Garden, which operates within the city’s park system, has demonstrated a long-standing commitment to showcasing the diversity of begonias. The Fort Worth Botanical Society provides additional ongoing support for this collection.


The extensive collection of Sarracenia at Atlanta Botanical Garden contains a wide variety of indexed species as well as horticulturally significant taxa. Sarracenia are carnivorous plants indigenous to the eastern US and Canada, Texas, and the Great Lakes, with most species occurring only in the southeast US. The climate in Atlanta is well suited for growing the majority of these species.


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