Minnesota Wildflowers


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Corallorhiza maculata (Spotted Coralroot)

Plant Info
Also known as: Summer Coralroot
Genus:Corallorhiza
Family:Orchidaceae (Orchid)
Life cycle:perennial
Origin:native
Habitat:part shade, shade; moist upland forest, swamps
Bloom season:June - August
Plant height:6 to 22 inches
USDA PLANTS database:Minnesota county distribution map

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Detailed Information

Flower: irregular raceme

[photo of flowers] Erect raceme of ½-inch flowers, from mixed yellow browns to nearly red throughout flowers and stems. Flaring at the top are 3 sepals and 2 lateral petals similar in size and color, purple tinged on the edges and outer surface with various speckling and spotting of purples on inner surfaces and column. A yellow squarish column is in the center, erect and curving out. The broad lower lip is white with purple spotting, minmally lobed, spreading out and curled in, wrinkled throughout. The prominent ovary and flower stalk are consistent with the darker colors of stem.

Leaves and stem: alternate simple

[photo of leaves] Leaves are reduced to overlapping sheathes. Smooth throughout, leaves and stem color is paler yellow browns to brighter reds. Stems are single to multiple clusters.

Fruit:

[photo of fruit] Ovaries develop into hanging elliptic capsules.

Notes:

Brightly colored clumps of Spotted Coralroot stand out on semi-shaded forest floors of north-central counties and the Arrowhead, but its range extends to the southeast counties as well. Two very similar varieties, differentiation based on range, minor morphological differences and bloom period have been described for Minnesota. Until found and images clearly recorded for us, we are treating these with one general indentity description.

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Map of native plant purveyors in the upper midwest

More photos

Photos courtesy Peter M. Dziuk, taken in Savanna Portage State Park in Aitkin County and Tettegouche State Park in Lake County

Comments

Have you seen this plant in Minnesota, or have any other comments about it?

Posted by: Tom in Crosby-Manitou State Park
on: 2010-06-07 12:18:21

I was on the "middle trail" at Crosby Manitou on Wednesday, June 2 returning from the cascades on the Manitou River. The plant that I saw and photographed was a single stem of a Spotted Coralroot, not a clump or bunch. It was/is located on the edge of the trail.

Posted by: Sharon in Tower, Mn., Lake Vermilion
on: 2010-06-11 13:23:28

I have this plant growing at our summer residence on Lake Vermilion, Tower, Mn. We are close to the BWCA. The flowers are beautiful, tiny and growing in a cluster of about 10 plants. They're growing along the shoreline where it's semi-shady and moist. This is the first year I've noticed them (June 11, 2010).

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