By state

Public gardens in Maryland

8 Maryland botanical gardens and arboretums, each mapped and typed.

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Adkins Arboretum — Maryland

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Brookside Gardens — Maryland

Cylburn Arboretum — Baltimore, Maryland

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Howard Peters Rawlings Conservatory and Botanic Gardens of Baltimore — Maryland

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Ladew Topiary Gardens — Maryland

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Patterson Park — Baltimore, Maryland

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Salisbury University Arboretum — Maryland

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University of Maryland Arboretum & Botanical Garden — College Park, Maryland