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Common Grass-pink

Calopogon Calopogon tuberosus (kal-oh-POH-gon too-ber-OH-sus too-ber-OH-sus)

Family: Orchidaceae Native Herbaceous (3-15 ft)

Grass Pink is a herbaceous perennial orchid, usually up to 3 feet tall, unbranched, with a single, basal, grasslike leaf. The central stem terminates in a spike of 2 to 15 fragrant flowers 1 to 1 1/2 inches long. The flowers bloom in summer and range in color from magenta to light pink with a cluster of yellow, stamen-like hairs at the top of the bloom. White flowers do appear, but are rare. The flowers bloom sequentially from the bottom to the top of the floral spike. In its native habitat, Grass Pink grows in savannas, floating peat mats, and in the bogs of the North Carolina Piedmont and mountains. Grass Pink prefers full or partial sun, wet to moist conditions, and soil containing some sand and/or peat. It grows best in evenly moist to wet, rich, well-draining soils in full sun, although it can tolerate various soil types. You can amend planting locations with plenty of sand and peat to ensure proper drainage. The plant is cold hardy in USDA Zones 3-9. You can obtain this orchid from specialist orchid nurseries and it can be cultivated in gardens if its requirements are met, however, wild orchids should never be collected. In some states, this orchid is now rare or listed as endangered due to habitat destruction and unscrupulous collecting. You should only purchase nursery propagated plants from reputable growers. Like other orchids, Grass Pink Orchid can be vulnerable to browsing by White-tailed Deer and other herbivores. The genus name Calopogon comes from the Greek kalos meaning "beautiful" and pogon meaning "beard" for the yellow, stamen-like hairs at the top of the flower which attract pollinators. The epithet tuberosus means "tuberous" and refers to the underground corms of this species. Diseases, Insect Pests, and Other Plant Problems: No major pest or disease problems.

Source: NC State Extension Gardener Plant Toolbox ↗ NC State Extension Gardener Plant Toolbox, 51 attributes.

How it fits the guild

Guild layer 4 - Herbaceous (3-15 ft) Optimal soil pH Acid (<6.0)
See companions & conflicts ↓

Companions & Conflicts

Curated pairwise relationships between this plant and others in the library — who feeds whom, who competes, who confuses the pests. Green reads as a good pairing, red as one to avoid.

No curated interactions recorded for this species yet.

Also noted by NC State

Related species the NC State Plant Toolbox flags for this plant — look-alikes to tell apart, and plants that play a similar role in a planting. Ones we carry in the library are linked.

Full plant profile

Growing Conditions
Plant type
Native Plant; Wildflower
Life cycle
Perennial
USDA zones
3a, 3b, 4a, 4b, 5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b, 9a, 9b
Light
Full sun (6 or more hours of direct sunlight a day) | Partial Shade (Direct sunlight only part of the day, 2-6 hours)
Soil texture
High Organic Matter; Loam (Silt); Sand
Soil pH
Acid (<6.0)
Soil drainage
Good Drainage | Moist | Occasionally Wet
NC region
Coastal; Mountains; Piedmont
Mature size
Height: 2 ft. 0 in. - 4 ft. 0 in. | Width: 1 ft. 0 in. - 2 ft. 0 in.
Maintenance
Low
Canopy layer
4 - Herbaceous (3-15 ft)
Form & Appearance
Habit / form
Erect
Texture
Medium
Leaf color
Green
Leaf type
Sheath; Simple
Leaf shape
Elliptical
Leaf margin
Entire
Leaf size
> 6 inches long, 1-3 inches wide
Hairs present
No
Leaf detail
A single 4 1/2 inch long, 1/4 to 1 1/2 inch wide ascending leaf occurs near the base of the central stem. The leaf tapers gradually into a narrow base enclosed by a sheath, while its tip is narrowly acute and hull-shaped. The upper surface of the leaf is often slightly concave. Both the upper and lower leaf surfaces are yellowish green to medium green and glabrous. Leaf venation is parallel. Below the well-developed leaf, there are 1-2 rudimentary leaves that are sheath-like and inconspicuous.
Flower color
Pink; Purple/Lavender
Flower value
Fragrant; Showy
Flower form
Spike
Flower shape
Tubular
Flower size
1-3 inches
Flower detail
Two to fifteen flowers, 1 to 1 1/2 inches long, in a spike at the end of a central stem. The rachis of this floral spike is green to reddish purple, terete, and glabrous. Each flower consists of 3 petaloid sepals, 3 petals, an exposed reproductive column, and an inferior ovary. Both the sepals and petals (excluding the petal that has been modified into a lip) are pink to deep rosy pink and may have faint veins of dark rosy pink. The sepals are ovate or broadly oblong-ovate in shape, while the petals are broadly elliptic or elliptic-ovate in shape. Depending on the stage of development, both petals and sepals are spreading and more or less incurved from their tips; their upper surfaces are flat to somewhat concave. The third petal has been modified into an upper lip about ¾ of an inch long. This upper lip is linear in shape (grooved above and convex below), except toward its tip, where it has been widened by 2 lateral lobes. At the center of this lobed tip, is a patch of white and a cluster of clubbed pseudo-stamens; these pseudo-stamens are hair-like in appearance and yellow to orange. Elsewhere, the lip is pink to rosy pink like the sepals and remaining petals. The lip is also hinged at its base. Flowers bloom from April to July.
Bloom time
Spring; Summer
Fruit type
Capsule
Fruit size
< 1 inch long
Fruit detail
Fertile flowers are replaced by seed capsules that are about ¾ of an inch long and ellipsoid-ovoid in shape; they eventually break open to release numerous tiny seeds, which are distributed by the wind. Fruit displays from July to September.
Stem color
Green
Stem detail
The central stem is green, glabrous, and terete.
Wildlife & Ecology
Native status
Native
Origin
Eastern Canada to Eastern United States, Bahamas to Cuba.
Distribution
Widely distributed within the eastern United States and South Eastern Canada.
Wildlife value
This plant attracts bees, bumblebees and other insects.
Attracts
Bees
Food & Medicine
Harvest time
Summer
Fruit type
Capsule
Landscape Use
Landscape location
Meadow; Slope/Bank
Landscape theme
Native Garden; Rain Garden
Design feature
Specimen
Garden tags
#NC native #Piedmont Mountains FACW #Coastal OBL #food source nectar #food source pollen #bumblebee friendly #food source summer #Audubon #bee friendly #orchid #native orchid #perennial #wildflower

Planted at Hunnicutt

Nobody’s planted this one yet.