Flower profile

Tuberous grass pink

Calopogon tuberosus

Tuberous grass pink (Calopogon tuberosus) is a flowering plant in the Orchidaceae family, native in the lower 48 states, blooming mostly April–July across the U.S.

Native to New Hampshire

Tuberous grass pink is a wildflower that USDA PLANTS lists as native in the lower 48 states. In New Hampshire it's most often seen in bloom in June–July.

33states where USDA records it

291NH sightings*

7,167U.S. sightings*

*iNaturalist research-grade observations, as of October 17, 2026.

On our lists for: New Hampshire

Quick look

Calopogon tuberosus, the tuberous grass pink, is an orchid native to eastern North America. It is a perennial forb.
From Wikipedia's article Calopogon tuberosus, CC BY-SA 4.0.

It belongs to the Orchidaceae family. ^iNaturalist
USDA PLANTS describes it as an herb (forb) with a perennial life cycle. ^{USDA PLANTS}
USDA PLANTS lists it as native in the lower 48 states and records it in 33 states. ^{USDA PLANTS}
NatureServe lists it as native to New Hampshire. ^NatureServe
In New Hampshire, most iNaturalist sightings of it in flower come in June–July. ^iNaturalist
iNaturalist has 291 research-grade sightings of it in New Hampshire, ranking #94 among the 157 flowers on our New Hampshire list. ^iNaturalist

When does it bloom?

In New Hampshire, most flowering sightings come in June–July.

Flowering records by month in New Hampshire (iNaturalist research-grade observations marked “Flowering”) (124 records)

Conservation status

Federal (U.S. ESA): Not listed No U.S. Endangered Species Act listing in the USFWS ECOS database. ^{USFWS ECOS}
NatureServe global: G5 Secure worldwide. ^NatureServe
New Hampshire: Not listed Not on New Hampshire Official Rare Plants List (Ncr 312, eff. Jan 1, 2020). NatureServe: SNR, not yet ranked in New Hampshire. ^{NH Ncr 312}
Rare elsewhere: Other states where NatureServe ranks it rare or missing: AR (S1), DC (SX), DE (S1), IA (SX), IL (S2), MD (S1), MO (S2), OH (S2), OK (S1), RI (S2), VA (S1). (S1 critically imperiled, S2 imperiled, SH possibly extirpated, SX presumed extirpated.)

Checked October 17, 2026. Rankings and lists can change, so follow the links for the latest.

Can you eat it?

For peopleNot well documented

None of the sources we checked (NC State Extension (no page for this plant), USDA PLANTS) say whether it's edible or poisonous for people.

For petsNot well documented

It isn't on the ASPCA plant list.

🌿 Never eat a wild plant unless you're certain of its ID; this isn't medical advice. Worried about a person? Call Poison Control at 1-800-222-1222. Worried about a pet? Call your vet.

Where does it grow?

USDA PLANTS records tuberous grass pink in 33 states plus Washington, D.C.

AKMEVTNHWAIDMTNDMNILWIMINYRIMAORNVWYSDIAINOHPANJCTCAUTCONEMOKYWVVAMDDEAZNMKSARTNNCSCDCOKLAMSALGAHITXFL

recorded by USDA PLANTS on our state lists not recorded

See the full list of states

Alabama, Arkansas, Connecticut, Delaware, Florida, Georgia, Illinois, Indiana, Iowa, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, New Hampshire, New Jersey, New York, North Carolina, Ohio, Oklahoma, Pennsylvania, Rhode Island, South Carolina, Tennessee, Texas, Vermont, Virginia, West Virginia, Wisconsin; District of Columbia.

New Hampshire counties with USDA records: Carroll, Cheshire, Coos, Hillsborough, Merrimack, Rockingham, Strafford.

Names, range and relatives

Native status by region (USDA PLANTS): Canada: Native; Lower 48 states: Native; St. Pierre and Miquelon: Native.

County records: USDA PLANTS lists it in 587 counties across 32 states; the most are in Michigan (54), Wisconsin (50), Florida (44).

More from the Orchidaceae family (23 on Bloomipedia; most observed first): Pink lady's slipper, Crane-fly orchid, Downy rattlesnake plantain, Broad-leaved helleborine, Western rattlesnake plantain, Spotted coralroot, Showy orchis, Putty root.

More New Hampshire flowers

Pink lady's slipper

Cypripedium acaule

★ NH state wildflowerNative

🌼 Blooms in NH: May–June

Rose pogonia

Pogonia ophioglossoides

Native

🌼 Blooms in NH: June–July

Canada mayflower

Maianthemum canadense

Native

🌼 Blooms in NH: May–June

Sources

USDA, NRCS. PLANTS Database, profile CATU5.
iNaturalist, Calopogon tuberosus: taxonomy, research-grade observation counts and “Flowering” annotations, retrieved October 17, 2026.
Wikipedia, Calopogon tuberosus (lead quoted under CC BY-SA 4.0).
New Hampshire: New Hampshire Official Rare Plants List (Ncr 312, eff. Jan 1, 2020).
New Hampshire: NH Prohibited Invasive Species List (Agr 3800, Table 3800.1).
USFWS, ECOS species database (ESA listing check), October 17, 2026.
NatureServe Explorer, Calopogon tuberosus (global and state ranks).
Edibility and toxicity: no source found (marked "not well documented").
Photo: er-birds via iNaturalist · CC BY 4.0 · resized.