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Plant Collections Network


The Santa Barbara Botanic Garden is dedicated to the goal of "securing the conservation of California's native plants." Of the Garden's native plant collections, the Dudleya collection is Nationally Accredited by the Plant Collections Network (formerly NAPCC). 

Rhododendron subsection fortunea

There are more than 1,000 different natural species in the Genus Rhododendron. Our garden, the Rhododendron Species Botanical Garden, is a 22-acre ‘living museum’ and home to one of the largest collections of species rhododendrons and azaleas in the world. RSBG displays over 700 species of Rhododendron from the wilds of North America, Europe, Asia, and Australia, as well as various companion plants. Of these, our Rhododendron subsection fortunea collection is Nationally Accredited by the Plant Collections Network (formerly NAPCC). 


Nestled along the banks of Bent Creek and easily reached from the main gardens, the National Native Azalea Collection is a woodland garden with azaleas representing every species native to the US, along with many natural hybrids and selections. In late spring and early summer the garden is a diverse and eye-catching composition of color, form, and fragrance set among native ferns, wild-flowers, shrubs and trees. During other times of the year the sky opens above the canopy and the natural architecture of the rock out-croppings is revealed.


The University of Washington Botanic Gardens maintains a large Ilex collection consisting of 47 taxa. The collection received National Accreditation by the Plant Collections Network (formerly NAPCC) in 2002. The hollies are at their peak from November through February. Don't miss the famous hedgehog holly, Ilex aquifolium 'Ferox Argentea', in our  holly collection.


In 2015 the Bartlett Tree Research Laboratories and Arboretum earned Plant Collections Network (formerly NAPCC) Accreditation for its Ulmus Collection. 


The Plant Collections Network (formerly North American Plant Collections Consortium, NAPCC) has awarded the Trillium collection at the Society’s Garden in the Woods its coveted designation as an Accredited Collection, which is the recognized standard for excellence in plant collections and demonstrates a garden’s enduring commitment to global efforts to save plants. Only 67 of the 500 public gardens in North America have received this accreditation.

Acer Multisite

Maples have horticultural and economic significance, widespread distribution and diversity. The genus Acer has been estimated to contain 238 botanical taxa and naturally occurring hybrids. No single institution can cultivate a comprehensive collection of maples, due to climatic and physical space limitations. This multisite collection combines the climatic variation, expertise, leadership, and physical space of 11 institutions throughout the United States and Canada.


Since 2002, the Arnold Arboretum has been a member of the Plant Collections Network (formerly North American Plant Collections Consortium, NAPCC), a network of botanical gardens administered through the American Public Gardens Association in cooperation with the U.S. Department of Agriculture. The primary focus of the Plant Collections Network is the long-term preservation of germplasm for research. Participating institutions commit to holding and developing collections that are primarily organized at the genus level.


In 2001, Mt. Cuba Center was granted Plant Collections Network (formerly North American Plant Collections Consortium, NAPCC) recognition as an official collection holder of the genus Trillium. At the present time, the collection includes 52 taxa, represented by 237 individual accessions. Species, varieties, cultivars, and horticulturally interesting forms are represented in aesthetically pleasing combinations with other woodland natives and/or in the research lath house.


In 2010, the rhododendron and mountain laurel collections at the Jenkins Arboretum became nationally recognized as the Arboretum joined the American Public Gardens Association’s Plant Collections Network (formerly North American Plant Collections Consortium, NAPCC) – a group of botanical institutions dedicated to preserving plant germplasm. 


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