Solidago rigida (Stiff Goldenrod)

Plant Info
Also known as:
Genus:Solidago
Family:Asteraceae (Aster)
Life cycle:perennial
Origin:native
Habitat:sun; dry fields, prairies, along roads
Bloom season:August - September
Plant height:1 to 5 feet
MN county distribution (click map to enlarge):Minnesota county distribution map
National distribution (click map to enlarge):National distribution map

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Detailed Information

Flower: Flower shape: 7+petals Cluster type: flat

[photo of flowers] A flat-topped cluster 2 to 5 inches across of 3/8-inch yellow flowers, each with 6 to 13 short petals (ray flowers) and a yellow center with up to 35 disk flowers. The rays are sometimes broad with rounded tips, sometimes more narrow with pointed tips.

Leaves and stem: Leaf attachment: alternate Leaf attachment: basal Leaf type: simple

[photo of basal leaves] There are both basal leaves, and leaves alternating up the stem. All leaves are a grayish green color, generally oval in shape, rough from short bristly hairs, and mostly toothless but may have a few rounded, shallow teeth. The basal leaves are up to 5½ inches long and 1½ inches wide and stand generally erect on long stalks.

[photo of stem leaves] The alternating leaves are about 2 inches long, become progressively smaller as they go up the stem, may have wavy edges, are fairly stiff (hence the common name), tend to point upward, and clasp the stem. Stems are stout and rough from short bristly hairs.

Fruit: Fruit type: seed with plume

[photo of fruit] Fruit is a dry seed with a tuft of white or light brown hairs to carry them off in the wind.

[photo of seed] Seed is softly angled, 2 to 2½ millimeters long, sometimes a bit hairy, with faint lines or ridges along its length and ripens from pale tan to brown. Much of the seed is eaten by insects before it ripens.

Notes:

Stiff Goldenrod commonly goes by Latin name Oligoneuron rigidum but the accepted name in Minnesota is Solidago rigida. There are 3 recognized subspecies, 2 of which are found in Minnesota. Subsp. rigida is most common; subsp. humilis is shorter, only to about 2 feet tall, more densely hairy overall with more compact, more dome-shaped flower clusters.

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More photos

Photos by K. Chayka taken in Ramsey, Chisago and McLeod counties. Photos courtesy Peter M. Dziuk taken in Anoka county.

Comments

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

Posted by: Dale - Inver Grove
on: 2010-08-26 18:03:04

My honeybees don't seem interested in Canada Goldenrod (Solidago canadensis), but they are all over the Stiff Goldenrod. Unfortunately, the Canada Goldenrod outnumbers the Stiff Goldenrod by about 10,000 to one.

Posted by: JAMES - S.E. Winona county
on: 2014-03-07 22:00:00

Planted stiff goldenrod in heavy clay on an East/West ridge. Other native forbs were compass, lead, blazing star, ohio spiderwort, liatris, big and little bluestem, indian, side oats and many others. The stiff flourished from season to season.

The primary advantage of the stiff is the overwhelming response of bees to the blooms. Other insects are also attracted to the nectar.

I managed to eradicate most of the canadensis by repeatedly hoeing and mowing when the plant is near blossom stage.

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