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Plants of the Eloise Butler Wildflower Garden

Common
Name

Scientific
Name

Plant
Family

Garden
Location

Prime
Season

Showy Goldenrod
Solidago speciosa Nutt.
Aster (Asteraceae)
Upland
Autumn
Other names and notes

Stems: In this Goldenrod, the inflorescence is a dense branched panicle that is taller than it is broad, at the top of an unbranched stem that can be from 8 to 60 inches high. Flowering branches of the panicle are held erect, not drooping or bending like most goldenrods. Roots may send up multiple stems which are smooth and usually reddish but the branches of the inflorescence can have fine hair. Leaves: The lance-shaped stiff leaves are usually without teeth, not hairy, and the uppers are much smaller. Leaves have a tapering base to the stem that appears like a short winged stalk. From the upper leaf axils below the inflorescence, small leaves may appear that look like wings. Flowers: The individual flowers have 6 to 8 yellow ray flowers, not all open at the same time, giving an unequal spacing look. The fertile disk flowers have a five lobed yellow corolla with out-flaring apex lobes and protruding stamens. The phyllaries (bracts) of the flower head are yellowish and slightly sticky. They are linear, but short and overlapping. Seeds are a dry achene with a fluffy white pappus for wind distribution. Roots are rhizomatous and fibrous. It grows best in full sun with dry to moderate moisture.

The genus name is from the Latin solidare, as the plants of this genus were known to "make whole". (see bottom of page). The species name means "showy".

Showy Goldenrod
Showy Goldenrod
Blooms from late September. Below: Seeds have a fluffy pappus to catch the wind.
Showy Goldenrod seed heads
Below right and left: The smooth reddish stems and lance shaped thick leaves of Showy Goldenrod. In the left photo note the small wing-like leaves that occur in the axils of the upper leaves. Below right: The root system of S. speciosa.
Showy Goldenrod Leaf and stem
Showy Goldenrod
Showy Goldenrod root
Below: Detail of Showy Goldenrod. Note the short yellow phyllaries arranged in an overlapping series, on the individual flower heads.
 
Showy Goldenrod
 

Notes: This plant is indigenous to the Garden area. Eloise Butler catalogued it on Sept. 6, 1907. It was listed on Martha Crone's 1951 Garden Census. It is native to Minnesota in a wide band of counties running from the SE to the NW, rarer in the SW the the NE. In the U.S. S. speciosa is found from the Rocky Mountains east to the coast excepting Alabama, Florida and Maine. In Canada it is known only in Ontario. An older botanical name for this species is S. rigidiuscula.

Medicinal Lore: The genus Solidago has several species including, speciosa, whose leaves and tops and roots were used by natives for various disorders. Here in Minnesota, Frances Densmore (Ref.#5) reported that the Chippewa used various species of Goldenrod for treating fevers, colds, ulcers and boils. Specifically in regards to S. speciosa, a decoction from pulverized roots was drank to treat lung trouble. A similar decoction was taken for hemorrhage when bleeding from the mouth occurred; another root decoction helped women with difficult childbirth labor. Boiled stalk or root was used as a warm compress on sprains when swelling occurred. These same decoctions of root would be used as general tonics. Dried stalk or root, combined with bear grease formed an ointment. Mrs. Grieve (Ref. #7) reports on European use of various species.

 
 

 
References: Plant characteristics are generally from sources 15, 16, 30, 31, 33, W2 & W3. Distribution principally from W2 and also 31, 34 and W1. Planting history generally from 1, 4 & 4a. Other sources by specific reference. See Reference List for details.  
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