Curtiss Dogwood Natural Area

🏆🏆🏆🏆 Botanical Rarity — One of the northernmost stands of native flowering dogwood in North America

Curtiss Dogwood Natural Area protects one of the northernmost stands of native flowering dogwood (Cornus florida) in North America. Flowering dogwood is a beloved tree of the mid-Atlantic and southeastern states, and its presence this far north in New Hampshire is a botanical anomaly — likely a relic population surviving in a microclimate sheltered from harsh winters. The site was first documented by botanist A.H. Moore in the early 1900s and is named for Dr. A.H. Curtiss, a noted American botanist.

Visitor Information

About Curtiss Dogwood

Curtiss Dogwood Natural Area in Merrimack protects one of the northernmost natural stands of flowering dogwood (Cornus florida) in the United States. This species reaches its northern range limit in southern New Hampshire — these trees represent a climatic boundary population that may prove genetically important as climate change shifts species ranges northward.

Things to Do

Viewing the flowering dogwood display (spectacular in May), nature photography, studying the northern range limit of a southern species, and wildflower observation.

Insider Tips

Northern limit: Curtiss Dogwood Natural Area protects a stand of flowering dogwood at its northern range limit in New Hampshire. Pro tip: Flowering dogwood is common in the Mid-Atlantic but reaches its northern boundary in southern New Hampshire — this stand is botanically significant as a range-edge population. Climate indicator: As climate warms, dogwood’s range may shift northward — making this population a bellwether for climate change.

Best Time to Visit

May: Dogwood bloom — spectacular white flowers. Fall: Red berries and fall color. Summer: Green canopy. Winter: Branching architecture visible.

Frequently Asked Questions

Why are range-edge populations important?

Populations at the edge of a species’ range carry unique genetic adaptations — they’ve evolved to survive at the limits of what the species can tolerate. As climate changes, these edge populations may contain genes critical for the species’ survival. Protecting them preserves genetic diversity — the raw material of adaptation. The Curtiss dogwood stand is a living laboratory for studying how trees respond to changing climate.

Wildlife & Nature

Curtiss Dogwood Natural Area — a small botanical preserve — protects a stand of alternate-leaf dogwood (Cornus alternifolia) at the northern edge of its range. The mixed forest habitat supports ruby-throated hummingbirds (attracted to dogwood flowers), cedar waxwings (eating the berries), and wood thrushes. Red efts (juvenile red-spotted newts) wander the forest floor in summer after rain.

Nearby Attractions

The natural area provides a quiet botanical study destination. New Hampshire’s forests host numerous rare and edge-of-range plant species due to the state’s position at the transition between temperate and boreal zones.