Clethra
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- Fig. 1-5. Trees Or Shrubs, Evergreen (Mal. Spp.)
- Preliminary List of Species Native Within the Adirondack Park Listed Alphabetically by Common Name and Sorted by Habit V.1 Updated 10.23.2006
- The Woody Plant Seed Manual
- The Clethra Collection
- Phylogeny, Historical Biogeography, and Diversification of Angiosperm
- A Chronology of Middle Missouri Plains Village Sites
- Almost-Perfect Flowering Shrubs for Central & Western Ohio
- Spring Walk & Tennis Court
- Supplementary File 1 (PDF, 351 Kib)
- Helpful Characteristics for Identifying Shrubs (And a Few Trees) in Winter
- Relative Susceptibility of Woody Landscape Plants to Japanese Beetle (Coleoptera: Scarabaeidae)
- Annotated Checklist of the Vascular Plants of the Washington - Baltimore Area
- Clethra Concordia (Clethraceae), a Shrubby New Species from the Crest of the Cordillera Del Co´Ndor on the Peru–Ecuador Border
- Gardeners and Bees: Actions to Protect the Pollinators
- Clethra Barbinervis
- Native Tree Families of Georgia Pub 12-32
- Sweet Pepperbush,Clethra Alnifolia
- Itea Virginica - Virginia Sweetspire (Saxifragaceae) ------Itea Virginica Is Known As a Tough Shrub with Showy Twigs Flowers and Outstanding Maroon Fall Color